20.—(1) Sections 178 to 181(1) of the principal Act shall have effect in relation to hazardous substances contravention notices, subject to the modifications set out in Part 2 of Schedule 4.
(2) The provisions of those sections, as modified under paragraph (1), are set out in Part 5 of Schedule 4.
Section 178 was amended by section 7 of, and paragraph 25 of Schedule 7 to, the Planning and Compensation Act 1991 (c. 34); section 179 was substituted by section 8 of that Act; section 180 was substituted by paragraph 26 of Schedule 7 to that Act; and section 181 was amended by paragraph 27 of that Schedule.