Regulation 12 Service in the reserve
A person transferred to the reserve in consequence of the exercise of a right conferred by regulation 5 or under regulation 6 shall serve in the reserve for a period beginning on the date of his transfer and ending—
(a)
6 years later; or
(b)
22 years after the relevant date;
whichever is the sooner, or for such shorter period as the competent military authority may approve.