25.— (1) The Executive shall, as soon as is practicable after making a relevant decision (but, in any case, not later than 4 weeks before the relevant decision takes effect), give notice in writing of the relevant decision, together with its reasons for the relevant decision, to the suppliers of the relevant listed items which fall within the relevant group of interchangeable medicinal products the subject of the relevant decision.

(2) The Executive may, in a relevant decision, specify a date, or the occurrence of an event, from which the relevant decision shall take effect.

(3) Part 4 of Schedule 1 shall have effect where the Executive proposes to make a relevant decision.

(4) In this section and Part 4 of Schedule 1 “relevant decision” means a decision of the Executive to set a reference price for a relevant group of interchangeable medicinal products.