(1) Where the Minister approves a variation of an R&D plan, the variation takes effect on:
(a) if the Minister also gives his or her approval under section 22 for the plan as varied to be in force as mentioned in that section--the day specified by the Minister in giving the approval under that section, or, where no such day is specified, the next 1 July after the day of approval of the variation; or
(b) in any other case--the day of approval of the variation.
(2) If the operation of an R&D plan (being a plan that has come into force) takes effect on the day of the Minister's approval of the variation, the plan as varied continues in force, on and after that day, as if the Minister had originally approved the plan as varied.