9031 90 00 — Parts and accessories

Pick the origin, the country of entry into the EU and the destination – the measures that apply along the route are shown.

TARIC: 9031 90 00  ·  Origin:  ·  Entry into EU:  ·  Destination:

Documents required – check the conditions

EU measures (by origin)

Duties & rates

Measure typeOrigin / areaDutyValiditySource
Airworthiness tariff suspension ERGA OMNES 0 % 2018-11-01 SE_TULLVERKET
Autonomous tariff suspension ERGA OMNES 0 % 2016-01-01 – 2016-12-31 SE_TULLVERKET
Import control of fluorinated greenhouse gases ERGA OMNES 2019-10-23 – 2021-12-31 SE_TULLVERKET
Non preferential duty under end-use ERGA OMNES 0 % 2007-01-01 – 2016-12-31 SE_TULLVERKET
Supplementary unit ERGA OMNES 2016-01-01 – 2016-12-31 SE_TULLVERKET
Suspension - goods for certain categories of ships, boats and other vessels and for drilling or production platforms ERGA OMNES 0 % 2016-07-01 – 2016-12-31 SE_TULLVERKET
Third country duty ERGA OMNES 2.8 % 2016-01-01 – 2016-06-30 SE_TULLVERKET
Third country duty ERGA OMNES 0 % 2017-01-01 SE_TULLVERKET

Entry measures

Pick a country above.

National measures (destination)

Pick a country above.

Documents & conditions (EU)

The full set of EU document conditions for this code. Which ones actually apply depends on the specific measure and the origin of the goods — pick what applies to your consignment.

Documents to present

CodeDocument / descriptionSource
A119 Airworthiness certificate or declaration in the commercial invoice containing the elements of the airworthiness certificate issued or a document annexed to the invoice EU
from feed SE_TULLVERKET
C052 Export authorisation for restricted goods and technologies EU
from feed SE_TULLVERKET
C057 Copy of the declaration of conformity - Option A, as referred to in Article 1.2 and in the Annex of Regulation (EU) 2025/2155 EU
from feed SE_TULLVERKET
C079 Copy of the declaration of conformity - Option B, as referred to in Article 1.2 and in the Annex of Regulation (EU) 2025/2155 EU
from feed SE_TULLVERKET
C082 Copy of the declaration of conformity - Option C, as referred to in Article 1.2 and in the Annex of Regulation (EU) 2025/2155 EU
from feed SE_TULLVERKET
C105 Export autorisation (Article 7.1. Reg 267/2012) EU
from feed SE_TULLVERKET
X002 Dual use export authorisation (Regulation 428/2009 and its amendments). EU
from feed SE_TULLVERKET
X060 Individual Export Authorisation - Article 12(1)(a) of the Regulation (EU) 2021/821 of the European Parliament and of the Council EU
from feed SE_TULLVERKET
X061 Union General Export Authorisation No EU001 - ANNEX II A - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council EU
from feed SE_TULLVERKET
X062 Union General Export Authorisation No EU002 - ANNEX II B - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council EU
from feed SE_TULLVERKET
X063 Union General Export Authorisation No EU003 - ANNEX II C - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council EU
from feed SE_TULLVERKET
X064 Union General Export Authorisation No EU004 - ANNEX II D - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council EU
from feed SE_TULLVERKET
X065 Union General Export Authorisation No EU005 - ANNEX II E - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council EU
from feed SE_TULLVERKET
X066 Union General Export Authorisation No EU006 - ANNEX II F - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council EU
from feed SE_TULLVERKET
X067 Union General Export Authorisation No EU007 - ANNEX II G - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council EU
from feed SE_TULLVERKET
X068 Union General Export Authorisation No EU008 - ANNEX II H - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council EU
from feed SE_TULLVERKET
X070 Global Export Authorisation - referred to in Article 12(1)(b) of the Regulation (EU) 2021/821 of the European Parliament and of the Council EU
from feed SE_TULLVERKET
X071 National General Export Authorisations in national Official Journals - ANNEX III C - referred to in Article 12(6) of the Regulation (EU) 2021/821 of the European Parliament and of the Council EU
from feed SE_TULLVERKET
X834 Export authorisation by virtue of article 3k.5 of Council Regulation (EU) 833/2014 EU
from feed SE_TULLVERKET
X837 Export authorisation by virtue of article 3k.5b of Council Regulation (EU) 833/2014 EU
from feed SE_TULLVERKET
X840 Export authorization by virtue of article 5q paragraph 1 of Council Regulation (EU) 833/2014 EU
from feed SE_TULLVERKET
X990 Export authorisation by virtue of articles 2.4 or article 2a.4 and 2b.1b of Council Regulation (EU) No 833/2014 EU
from feed SE_TULLVERKET
X991 The prohibitions defined in articles 2.1 and 2a.1 of Council Regulation (EU) No 833/2014 do not apply (see contractual exemptions in article 2.5 and article 2a.5 - export authorization) EU
from feed SE_TULLVERKET
X993 Export authorisation by virtue of articles 2 (3) (a) or 2 (3) (b) of Council Regulation (EU) 2023/1529 EU
from feed SE_TULLVERKET

Declarations & exemptions — declare the one matching your goods

CodeDocument / descriptionSource
Y243 Goods exempted from prohibition by virtue of Article 10 of Regulation (EU) 267/2012 EU
from feed SE_TULLVERKET
Y250 Exemptions from prohibition by virtue of Article 6. a,b and c (Annex I - II Reg 267/2012 ) EU
from feed SE_TULLVERKET
Y251 Exemptions from prohibition by virtue of Article 6. (d) and (e) (Annex I - II Reg 267/2012 ) EU
from feed SE_TULLVERKET
Y252 The declared goods are not concerned by Council Regulation (EU) No. 267/2012, Annex IIA EU
from feed SE_TULLVERKET
Y253 The declared goods are not concerned by Council Regulation (EU) No. 267/2012, Annex VI EU
from feed SE_TULLVERKET
Y254 By virtue of article 8.4 Regulation (EU) No. 267/2012 items included in the Common Military List, or in Annex I, II or IIA are excluded from Annex VI and VIA EU
from feed SE_TULLVERKET
Y692 The prohibitions defined in article 4 paragraph 1 of Council Regulation (EU) No 833/2014 do not apply (see exemptions in article 4 paragraph 2) EU
from feed SE_TULLVERKET
Y708 The prohibitions defined in article 3k paragraph 1 of Council Regulation (EU) No 833/2014 do not apply (see exemptions in article 3k paragraph 4a) EU
from feed SE_TULLVERKET
Y750 The declared goods are not concerned by Council Regulation (EC) No. 267/2012, Annex II EU
from feed SE_TULLVERKET
Y753 The declared goods are not concerned by Council Regulation (EC) No. 2017/1509, Annex II EU
from feed SE_TULLVERKET
Y757 The prohibitions defined in article 1aa.1 of Council Regulation (EC) No 765/2006 do not apply (see exemptions in article 1aa.2a) EU
from feed SE_TULLVERKET
Y758 The prohibitions defined in article 1aa paragraph 1 of Council Regulation (EC) No 765/2006 do not apply (see contractual exemptions in article 1aa paragraph 2b) EU
from feed SE_TULLVERKET
Y759 Goods other than those described in the Common Military List of the European Union EU
from feed SE_TULLVERKET
Y832 The prohibitions defined in article 3k.1 of Council Regulation (EU) No 833/2014 do not apply (see contractual exemptions in article 3k.3a) EU
from feed SE_TULLVERKET
Y833 The prohibitions defined in article 3k paragraph 1 of Council Regulation (EU) No 833/2014 do not apply (see exemptions in article 3k paragraph 4) EU
from feed SE_TULLVERKET
Y890 Goods other than those concerned by the prohibitions defined in article 2.1 of Regulation (EU) 2023/1529 EU
from feed SE_TULLVERKET
Y892 The prohibitions defined in article 2.1 of Council Regulation (EU) 2023/1529 do not apply (see contractual exemptions in article 2.7) EU
from feed SE_TULLVERKET
Y901 Product not included in the dual use list EU
from feed SE_TULLVERKET
Y920 Goods other than those described in the footnotes linked to the measure EU
from feed SE_TULLVERKET
Y924 Goods not concerned by Regulation (EU) 2017/852 EU
from feed SE_TULLVERKET
Y950 Goods other than pre-charged equipment with hydrofluorocarbons EU
from feed SE_TULLVERKET
Y951 Exemption from the reduction of the quantity of hydrofluorocarbons placed on the market by virtue of Article 16.2 (a), (b), (d), (e) of Regulation (EU) 2024/573 EU
from feed SE_TULLVERKET
Y963 Goods other than those described in the MG footnotes linked to the measure (Annex II, Part IV of Reg. (EU) 2017/1509) EU
from feed SE_TULLVERKET
Y966 Goods other than those described in the MG footnotes linked to the measure (Missile Technology Control Regime list - Annex III of Reg. (EU) 267/2012) EU
from feed SE_TULLVERKET
Y969 Mercury-added products essential for civil protection and military uses; or intended for research, calibration of instrumentation or for use as reference standard (Article 5 (2) of Regulation (EU) 2017/852) EU
from feed SE_TULLVERKET
Y987 The prohibitions defined in articles 2.1 and 2a.1 of Council Regulation (EU) No 833/2014 do not apply (see exemptions in articles 2.3 and 2a.3) EU
from feed SE_TULLVERKET
Y995 Goods other than those concerned by the prohibitions defined in articles 2.1 and 2a.1 of Regulation (EU) No 833/2014 EU
from feed SE_TULLVERKET

Documents to choose between

These measures are answered with one document from each group — either the certificate, or a declaration that the act does not apply to the goods. Giving two from one group is a contradiction and customs rejects the entry.

Exactly one of: All third countries

X002
Y901 Product not included in the dual use list

Exactly one of: All third countries

Y924 Goods not concerned by Regulation (EU) 2017/852
Y969 Mercury-added products essential for civil protection and military uses; or intended for research, calibration of instrumentation or for use as reference standard (Article 5 (2) of Regulation (EU) 2017/852)

Exactly one of: All third countries

X060 Individual Export Authorisation - Article 12(1)(a) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X061 Union General Export Authorisation No EU001 - ANNEX II A - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X062 Union General Export Authorisation No EU002 - ANNEX II B - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X063 Union General Export Authorisation No EU003 - ANNEX II C - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X064 Union General Export Authorisation No EU004 - ANNEX II D - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X065 Union General Export Authorisation No EU005 - ANNEX II E - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X066 Union General Export Authorisation No EU006 - ANNEX II F - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X067 Union General Export Authorisation No EU007 - ANNEX II G - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X068 Union General Export Authorisation No EU008 - ANNEX II H - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X070 Global Export Authorisation - referred to in Article 12(1)(b) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X071 National General Export Authorisations in national Official Journals - ANNEX III C - referred to in Article 12(6) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
Y901 Product not included in the dual use list

Exactly one of: Belarus

Y757 The prohibitions defined in article 1aa.1 of Council Regulation (EC) No 765/2006 do not apply (see exemptions in article 1aa.2a)
Y758 The prohibitions defined in article 1aa paragraph 1 of Council Regulation (EC) No 765/2006 do not apply (see contractual exemptions in article 1aa paragraph 2b)
Y759 Goods other than those described in the Common Military List of the European Union

Exactly one of: ERGA OMNES

C057 Copy of the declaration of conformity - Option A, as referred to in Article 1.2 and in the Annex of Regulation (EU) 2025/2155
Y950

Exactly one of: ERGA OMNES

C057 Copy of the declaration of conformity - Option A, as referred to in Article 1.2 and in the Annex of Regulation (EU) 2025/2155
C079 Copy of the declaration of conformity - Option B, as referred to in Article 1.2 and in the Annex of Regulation (EU) 2025/2155
Y950
Y951 Exemption from the reduction of the quantity of hydrofluorocarbons placed on the market by virtue of Article 16.2 (a), (b), (d), (e) of Regulation (EU) 2024/573

Exactly one of: ERGA OMNES

C057 Copy of the declaration of conformity - Option A, as referred to in Article 1.2 and in the Annex of Regulation (EU) 2025/2155
C079 Copy of the declaration of conformity - Option B, as referred to in Article 1.2 and in the Annex of Regulation (EU) 2025/2155
C082 Copy of the declaration of conformity - Option C, as referred to in Article 1.2 and in the Annex of Regulation (EU) 2025/2155
Y950
Y951 Exemption from the reduction of the quantity of hydrofluorocarbons placed on the market by virtue of Article 16.2 (a), (b), (d), (e) of Regulation (EU) 2024/573

Exactly one of: Iran, Islamic Republic of

X993 Export authorisation by virtue of articles 2 (3) (a) or 2 (3) (b) of Council Regulation (EU) 2023/1529
Y890 Goods other than those concerned by the prohibitions defined in article 2.1 of Regulation (EU) 2023/1529

Exactly one of: Iran, Islamic Republic of

X993 Export authorisation by virtue of articles 2 (3) (a) or 2 (3) (b) of Council Regulation (EU) 2023/1529
Y890 Goods other than those concerned by the prohibitions defined in article 2.1 of Regulation (EU) 2023/1529
Y892 The prohibitions defined in article 2.1 of Council Regulation (EU) 2023/1529 do not apply (see contractual exemptions in article 2.7)

Exactly one of: Iran, Islamic Republic of

Y243 Goods exempted from prohibition by virtue of Article 10 of Regulation (EU) 267/2012
Y253 The declared goods are not concerned by Council Regulation (EU) No. 267/2012, Annex VI
Y254 By virtue of article 8.4 Regulation (EU) No. 267/2012 items included in the Common Military List, or in Annex I, II or IIA are excluded from Annex VI and VIA

Exactly one of: Iran, Islamic Republic of

C052 Export authorisation for restricted goods and technologies
X060 Individual Export Authorisation - Article 12(1)(a) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X061 Union General Export Authorisation No EU001 - ANNEX II A - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X062 Union General Export Authorisation No EU002 - ANNEX II B - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X063 Union General Export Authorisation No EU003 - ANNEX II C - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X064 Union General Export Authorisation No EU004 - ANNEX II D - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X065 Union General Export Authorisation No EU005 - ANNEX II E - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X066 Union General Export Authorisation No EU006 - ANNEX II F - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X067 Union General Export Authorisation No EU007 - ANNEX II G - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X068 Union General Export Authorisation No EU008 - ANNEX II H - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X070 Global Export Authorisation - referred to in Article 12(1)(b) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X071 National General Export Authorisations in national Official Journals - ANNEX III C - referred to in Article 12(6) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
Y750 The declared goods are not concerned by Council Regulation (EC) No. 267/2012, Annex II

Exactly one of: Iran, Islamic Republic of

C052 Export authorisation for restricted goods and technologies
X060 Individual Export Authorisation - Article 12(1)(a) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X061 Union General Export Authorisation No EU001 - ANNEX II A - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X062 Union General Export Authorisation No EU002 - ANNEX II B - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X063 Union General Export Authorisation No EU003 - ANNEX II C - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X064 Union General Export Authorisation No EU004 - ANNEX II D - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X065 Union General Export Authorisation No EU005 - ANNEX II E - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X066 Union General Export Authorisation No EU006 - ANNEX II F - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X067 Union General Export Authorisation No EU007 - ANNEX II G - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X068 Union General Export Authorisation No EU008 - ANNEX II H - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X070 Global Export Authorisation - referred to in Article 12(1)(b) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X071 National General Export Authorisations in national Official Journals - ANNEX III C - referred to in Article 12(6) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
Y250 Exemptions from prohibition by virtue of Article 6. a,b and c (Annex I - II Reg 267/2012 )
Y251 Exemptions from prohibition by virtue of Article 6. (d) and (e) (Annex I - II Reg 267/2012 )
Y252 The declared goods are not concerned by Council Regulation (EU) No. 267/2012, Annex IIA

Exactly one of: Iran, Islamic Republic of

C105 Export autorisation (Article 7.1. Reg 267/2012)
X060 Individual Export Authorisation - Article 12(1)(a) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X061 Union General Export Authorisation No EU001 - ANNEX II A - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X062 Union General Export Authorisation No EU002 - ANNEX II B - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X063 Union General Export Authorisation No EU003 - ANNEX II C - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X064 Union General Export Authorisation No EU004 - ANNEX II D - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X065 Union General Export Authorisation No EU005 - ANNEX II E - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X066 Union General Export Authorisation No EU006 - ANNEX II F - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X067 Union General Export Authorisation No EU007 - ANNEX II G - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X068 Union General Export Authorisation No EU008 - ANNEX II H - referred to in Article 12(1)(d) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X070 Global Export Authorisation - referred to in Article 12(1)(b) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
X071 National General Export Authorisations in national Official Journals - ANNEX III C - referred to in Article 12(6) of the Regulation (EU) 2021/821 of the European Parliament and of the Council
Y250 Exemptions from prohibition by virtue of Article 6. a,b and c (Annex I - II Reg 267/2012 )
Y251 Exemptions from prohibition by virtue of Article 6. (d) and (e) (Annex I - II Reg 267/2012 )
Y750 The declared goods are not concerned by Council Regulation (EC) No. 267/2012, Annex II

Exactly one of: North Korea

C052 Export authorisation for restricted goods and technologies
Y753 The declared goods are not concerned by Council Regulation (EC) No. 2017/1509, Annex II

Exactly one of: North Korea

C052 Export authorisation for restricted goods and technologies
Y920 Goods other than those described in the footnotes linked to the measure

Exactly one of: Russian Federation

X834 Export authorisation by virtue of article 3k.5 of Council Regulation (EU) 833/2014
X837 Export authorisation by virtue of article 3k.5b of Council Regulation (EU) 833/2014
X840 Export authorization by virtue of article 5q paragraph 1 of Council Regulation (EU) 833/2014
Y833 The prohibitions defined in article 3k paragraph 1 of Council Regulation (EU) No 833/2014 do not apply (see exemptions in article 3k paragraph 4)

Exactly one of: Russian Federation

X834 Export authorisation by virtue of article 3k.5 of Council Regulation (EU) 833/2014
X837 Export authorisation by virtue of article 3k.5b of Council Regulation (EU) 833/2014
X840 Export authorization by virtue of article 5q paragraph 1 of Council Regulation (EU) 833/2014
Y708 The prohibitions defined in article 3k paragraph 1 of Council Regulation (EU) No 833/2014 do not apply (see exemptions in article 3k paragraph 4a)
Y833 The prohibitions defined in article 3k paragraph 1 of Council Regulation (EU) No 833/2014 do not apply (see exemptions in article 3k paragraph 4)

Exactly one of: Russian Federation

X834 Export authorisation by virtue of article 3k.5 of Council Regulation (EU) 833/2014
X837 Export authorisation by virtue of article 3k.5b of Council Regulation (EU) 833/2014
X840 Export authorization by virtue of article 5q paragraph 1 of Council Regulation (EU) 833/2014
Y832 The prohibitions defined in article 3k.1 of Council Regulation (EU) No 833/2014 do not apply (see contractual exemptions in article 3k.3a)
Y833 The prohibitions defined in article 3k paragraph 1 of Council Regulation (EU) No 833/2014 do not apply (see exemptions in article 3k paragraph 4)

Exactly one of: Russian Federation

X840 Export authorization by virtue of article 5q paragraph 1 of Council Regulation (EU) 833/2014
X990 Export authorisation by virtue of articles 2.4 or article 2a.4 and 2b.1b of Council Regulation (EU) No 833/2014
X991 The prohibitions defined in articles 2.1 and 2a.1 of Council Regulation (EU) No 833/2014 do not apply (see contractual exemptions in article 2.5 and article 2a.5 - export authorization)
Y987 The prohibitions defined in articles 2.1 and 2a.1 of Council Regulation (EU) No 833/2014 do not apply (see exemptions in articles 2.3 and 2a.3)
Y995 Goods other than those concerned by the prohibitions defined in articles 2.1 and 2a.1 of Regulation (EU) No 833/2014

Exactly one of: Russian Federation · Zimbabwe

Y692 The prohibitions defined in article 4 paragraph 1 of Council Regulation (EU) No 833/2014 do not apply (see exemptions in article 4 paragraph 2)
Y759 Goods other than those described in the Common Military List of the European Union

Check a combination

Paste the codes you intend to declare — we check whether any of them rule each other out.