(1)  An authority for an authorised officer remains in force until cancelled under section 9 .

(2)  An authority for an authorised civilian remains in force until the end of the period specified in the authority in accordance with section 7(2)(h)(iii) , unless the authority is cancelled sooner under section 9 .

(3)  A fresh authority may be issued to an authorised civilian before or after the end of the period specified in the initial authority.