Service in the reserve13
A person transferred to the reserve in consequence of the exercise of the rights conferred by regulations 4, 5, 6 and 7 or under regulation 9 with the approval of the competent air force authority 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 air force authority may approve.