(1) Section 10(1) of the Principal Act is hereby amended by -
(a) the substitution in paragraph (c) of "£20,300" for "£19,300" (inserted by section 12 of the Act of 1991), and
(b) the substitution in paragraph (cc) of "£19,000" for "£18,000" (inserted by section 12 of the Act of 1991).
(2) This section shall come into operation on the 6th day of April, 1992.