(1) A relevant decision-maker may, at any time, vary an individual permit by written notice to the permit holder.(2) A variation of a permit under subsection (1) may be made (a) on the relevant decision-maker's own initiative; or(b) on the application of the permit holder.(3) A variation of a permit under subsection (1) may include, but is not limited to (a) the imposition of a new condition on the permit; or(b) the extension of the duration of the permit; or(c) the substitution or amendment of a condition on the permit; or(d) the removal of a condition from the permit.(4) The regulations may prescribe (a) the procedures for applying for a variation of a permit; and(b) fees payable for such applications, including a fee for the reissue of the permit as varied.