15. Any of the following decisions of the Director have effect in the first instance as a provisional decision—
(a)any decision to approve a plan under regulation 5(a) and any decision to approve or not to approve a plan under regulation 5 (c) or (d);
(b)any decision to approve or not to approve a variation under regulation 8;
(c)any enforcement decision under regulation 9(b), (c), (f)(i), (f)(ii), (g)(i) or (g)(ii).