"(8) The provisions of this section shall be deemed to have been in operation on the commencement of section 28 of the Act of 1989 and to have been incorporated in that section from that date and every regulation made in exercise of the powers under that section and not revoked before the commencement of this section shall be deemed to have been made in the exercise of the powers under the provisions of that section, including the provisions of this section deemed to have been incorporated in that section by this subsection.".