Income Tax Act 2007 (2007 No 97): section ZA 2(1)
Income Tax Act 2004 (2004 No 35): section YA 2
Tower Corporation Amendment Act 1995 (1995 No 2 (P))
Income Tax Act 1994 (1994 No 164): section YB 1
Tower Corporation Act 1990 (1990 No 2 (P)): section 27
Tower Corporation Act Commencement Order 1990 (SR 1990/195)