Part 6 Oil activities Finance Act 1980 (c. 48) Finance Act 1982 (c. 39) Income and Corporation Taxes Act 1988 (c. 1) Finance Act 1991 (c. 31) Finance Act 1999 (c. 16) Income Tax (Trading and Other Income) Act 2005 (c. 5) Income Tax Act 2007 (c. 3) Part 6