Paragraph 4

Each State, at the time of signature or ratification, acceptance or approval of this Convention or accession thereto, or each regional economic integration organization, at the time of signature or deposit of an act of formal confirmation or accession, may declare that it does not consider itself bound by paragraphs 2 and 3 of this article. The other Parties shall not be bound by paragraphs 2 and 3 with respect to any Party having made such a declaration.