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1. Should one of the Contracting Parties consider it desirable for modifications to be made to the standard international Customs declaration form annexed to this Convention, it shall submit its proposed amendment to the Secretary-General of the United Nations who shall communicate the text thereof to all signatory or acceding countries.
2. The amendment shall be deemed to come into force ninety days from the date of the communication provided for in the preceding paragraph, unless, before the expiry of that period, at least one-third of the signatory or acceding countries have notified the Secretary-General of the United Nations of their objection to the amendment.
3. The Secretary-General of the United Nations shall record the entry into force of amendments to the annex and shall inform all signatory or acceding countries thereof.