21. Section 66(2) to (4)(1) of the 1981 Act (exclusive privilege of the Post Office with respect to the conveyance etc of letters) shall apply on and after 26th March 2001 in respect of any act done or service performed before 26th March 2001 which infringed the exclusive privilege conferred on the Post Office by section 66(1) and in respect of a letter caused to be conveyed, or tendered, or delivered to be conveyed, before 26th March 2001 by any means which infringed that privilege.
Section 66 of the 1981 Act was amended by S.I. 1999/2107 and its repeal was commenced by S.I. 2000/2957 (C.88) with effect from 26th March 2001.