Changes made by Merchant Shipping (Increased Penalties) 1979
S.I. 1979/1519
Made to Merchant Shipping (Crew Agreements, Lists of Crew and Discharge of Seamen) (Fishing Vessels) 1972
3 changes. All changes made by Merchant Shipping (Increased Penalties) 1979
From legislation.gov.uk's record of changes, the official one: see it there.