(1) The Authority may vary or revoke an exemption at any time—
(a) in the case of an exemption applying to a class of person, process, substance, activity or thing, by placing a notice in the Government Gazette setting out the variation, or stating that the exemption has been revoked; or
(b) in any other case, by giving a written notice of the variation or revocation to the person to whom the exemption applies within 14 days after deciding to vary or revoke the exemption.
(2) The notice must include the Authority's reasons for varying or revoking the exemption.
(3) A revocation, or variation, of an exemption takes effect—
(a) if subregulation (1)(a) applies, on the day on which the notice required by that subregulation is published in the Government Gazette or on any later day specified in the notice; or
(b) if subregulation (1)(b) applies, on the day on which the person is given the written notice of the revocation or variation, or on any later day specified in the notice.