The Sea Pollution Act 1991 makes provision for the prevention of pollution of the sea by oil and other substances and to give effect to the International Convention for the Prevention of Pollution from Ships done at London on 2 November 1973, as amended by the protocol done at London on 17 February 1978, MARPOL 73/78, also known as the MARPOL Convention. Regulations covering the various sources of ship generated pollution were originally contained in the five annexes of the convention.