20 Variation or revocation of measures
(1) The Council may vary or revoke any national environment protection measure.(2) If the Council intends to vary or revoke a national environment protection measure, the Council must publish a notice specifying the measure that the Council intends varying or revoking.(3) The notice must:(a) be published in the Commonwealth of Australia Gazette, and(b) so far as each participating State or Territory is concerned—also be published, on at least 2 days during the month when the Commonwealth of Australia Gazette notice is published, in a newspaper circulating in that State or Territory.(4) Sections 15, 17, 18 and 19 apply to a variation or revocation of a national environment protection measure as if:(a) a reference to making a national environment protection measure were a reference to a variation or revocation of a national environment protection measure, as the case may be, and(b) a reference to a national environment protection measure were a reference to the variation or revocation of such a measure, as the case may be, and(c) a reference to a proposed national environment protection measure were a reference to a proposed variation or proposed revocation of such a measure, as the case may be, and(d) the reference in section 17 to the day on which section 16 (2) (b) has been fully complied with in all participating jurisdictions were a reference to the day on which subsection (3) (b) of this section has been fully complied with in all participating jurisdictions.(5) Subsections (2)–(4) do not apply to a minor variation of a national environment protection measure under Division 2A.

