—(1) Where it appears to the Commissioner that there has been a contravention of section 18(1) or (2) or 19(1), he may serve a reinstatement notice on all or any of the following persons:
(2) A reinstatement notice under subsection (1) shall require the person upon whom it is served to remedy (wholly or in part) the contravention or to remedy any injury or damage to the heritage road green buffer caused by that contravention and may, in particular, require that person —
to cease or refrain from, either wholly or to the extent specified in the notice, any activity on the premises concerned;
to alter, demolish or remove any property or material from the premises concerned, or any structure, object, fence, retaining wall, foundation, manhole, pipe, cable, mains or any obstruction or structure (whether temporary or permanent) he has erected or caused to be erected thereon in contravention of section 19(1);
to restore any part of the heritage road green buffer to its former state or, if such restoration is not reasonably practicable or is undesirable, to execute such works as the Commissioner may specify in the notice to alleviate the effect of the contravention of section 18(1) or (2) or 19(1), as the case may be, including planting such trees or plants and taking measures for their maintenance; or
(3) A reinstatement notice under this section shall specify the date on which it is to take effect and the period (which shall run from the date the reinstatement notice takes effect) within which any step required by the notice shall be taken.