Article 29 relates only to unilateral termination of the Convention by a Contracting…

Nothing in that Article should be construed as preventing the Contracting States from concluding a new bilateral agreement, subject to ratification, that supersedes, amends or terminates provisions of the Convention without the 5-year waiting period or the six-month notification period.

Customary international law observed by the United States and other countries, as reflected in the Vienna Convention on Treaties, allows termination by one Contracting State at any time in the event of a "material breach" of the agreement by the other Contracting State.

PROTOCOL

A Protocol, signed on the same occasion and forming an integral part of the Convention, amplifies the provisions of the Convention. Because it is an integral part of the Convention, its entry into force and termination are governed, respectively, by Article 28 (Entry into Force) and Article 29 (Termination) of the Convention.