15For section 1(4) of the Uniform Laws on International Sales Act 1967 substitute the following: —
“(4)In determining the extent of the application of the Uniform Law on Sales by virtue of Article 4 thereof (choice of parties)—
(a)in relation to a contract made before 18 May 1973, no provision of the law of any part of the United Kingdom shall be regarded as a mandatory provision within the meaning of that Article ;
(b)in relation to a contract made on or after 18 May 1973 and before 1 February 1978, no provision of that law shall be so regarded except sections 12 to 15, 55 and 56 of the Sale of Goods Act 1979 ;
(c)in relation to a contract made on or after 1 February 1978, no provision of that law shall be so regarded except sections 12 to 15 of the Sale of Goods Act 1979”.