Agreement concerning Cooperation in taking Measures against Pollution of the Sea by Oil (Sept. 16, 1971) Países/Territorios Entrada en vigor Fecha de firma simple Dinamarca Oct 16, 1971 Sep 16, 1971 Finlandia Oct 16, 1971 Sep 16, 1971 Noruega Oct 16, 1971 Sep 16, 1971 Suecia Oct 16, 1971 Sep 16, 1971