Regulation 3 Amendment of the Hydrocarbon Oil Regulations 1973 Original text. Later amendments are not shown. The Hydrocarbon Oil Regulations 1973f1 shall be amended as follows. Annotations Footnotes f1 S.I. 1973/1311; amended by S.I. 1976/443, 1977/1868, 1981/1134, 1985/1033, 1985/1450, 1992/3149 and 1993/2267. ← Regulation 2 Regulation 3 Regulation 4 →