Section 64 of the 1969 Act (inviolability of mails) shall apply in respect of a postal packet posted before 26th March 2001 and the references in section 64 to the Post Office and to a person who is engaged in its business shall be read as including references to the successor postal services company and to a person engaged in its business, respectively.

The references in section 64(3) of the 1969 Act to sections 16 and 17 of the 1953 Act shall be read as including references to sections 105 (application of customs and excise enactments to certain postal packets) and 106 (power to detain postal packets containing contraband) of the Act.