Artikel 4

1. In accordance with the requirements specified in Annex 1, each Party shall prohibit and/or restrict:
a) the application, re-application, installation, or use of harmful antifouling systems on ships referred to in article 3(1)(a) or (b); and
b) the application, re-application, installation or use of such systems, whilst in a Party’s port, shipyard, or offshore terminal, on ships referred to in article 3(1)(c),
and shall take effective measures to ensure that such ships comply with those requirements.
2. Ships bearing an anti-fouling system which is controlled through an amendment to Annex 1 following entry into force of this Convention may retain that system until the next scheduled renewal of that system, but in no event for a period exceeding 60 months following application, unless the Committee decides that exceptional circumstances exist to warrant earlier implementation of the control.