Changes to Merchant Shipping (Prevention of Pollution) (Intervention) 1980
S.I. 1980/1093
Made by Merchant Shipping (Prevention of Pollution) (Intervention) (Foreign Ships) 1997
2 changes. All changes to Merchant Shipping (Prevention of Pollution) (Intervention) 1980
From legislation.gov.uk's record of changes, the official one: see it there.