ADR mixed packing provision MP21

Class 1 articles: same UN number, own means of initiation under conditions, or compatibility groups C, D and E; no other classes.

MP21 lets the articles share a package with articles of the same UN number. Class 1 goods of other UN numbers are barred except their own means of initiation and articles of compatibility groups C, D and E. Their own means of initiation qualify if they will not function in normal carriage, or have at least two effective protective features against setting off the article, or, lacking those features (compatibility group B), the competent authority of the country of origin judges that accidental functioning will not explode the article in normal carriage. Other classes and non-ADR goods may not be included. A mixed package may need its classification revised under 2.2.1.1, and 5.4.1.2.1 (b) governs the description in the transport document.

Conditions

• (a)(i) Own means of initiation that will not function in normal carriage; or
• (a)(ii) own means of initiation with at least two effective protective features preventing explosion of the article if accidentally functioned; or
• (a)(iii) own means of initiation without two such features (compatibility group B), where the competent authority of the country of origin considers accidental functioning will not explode the article in normal carriage; if the country of origin is not an ADR Contracting Party, that approval must be validated by the first Contracting Party the consignment reaches.
• (b) Articles of compatibility groups C, D and E.

Note. Labels MP21 to MP23 on page 178 are printed in a column beside the text; texts are assigned in printed order.

Refers to: 2.2.1.1; 5.4.1.2.1 (b).

Carried by 53 Table A entries

UN 0006 · UN 0034 · UN 0035 · UN 0038 · UN 0042 · UN 0043 · UN 0048 · UN 0056 · UN 0059 · UN 0060 · UN 0065 · UN 0099 · UN 0102 · UN 0104 · UN 0124 · UN 0137 · UN 0138 · UN 0168 · UN 0169 · UN 0181 and 33 more UN numbers