A person on whom a remediation notice is served may, within the period of twenty-one days beginning with the day on which the notice is served, appeal against the notice—
and in the following provisions of this section "the appellate authority" means the Secretary of State or the National Assembly for Wales, as the case may be.
On any appeal under subsection (1) above the appellate authority—
Where an appellate authority confirms a remediation notice, with or without modification, it may extend the period specified in the notice for doing what the notice requires to be done.
Regulations may make provision with respect to—
Regulations under subsection (4) above may (among other things)—
This section, . . . , is subject to section 114 of the Environment Act 1995 (delegation or reference of appeals etc).