These Regulations amend the Corporation Tax (Treatment of Unrelieved Surplus Advance Corporation Tax) Regulations 1999 (S.I. 1999/358) (“the 1999 regulations”). The 1999 regulations provided for the treatment of unrelieved surplus advance corporation tax arising as a result of the abolition (by virtue of section 31 of the Finance Act 1998 (c. 36)) of advance corporation tax (“ACT”) in respect of distributions made by a company on or after 6th April 1999.