(1) This section applies if the Secretary of State's TPIM powers expire or are repealed under section 21.

(2) A TPIM notice which is in force immediately before expiry or repeal is to -

(a) continue in force for the period of 28 days beginning with expiry or repeal; and

(b) be treated as if revoked by the Secretary of State at the end of that period.

(3) Subsection (2)(a) is subject to -

(a) any variation under section 12(1)(a) or (b), and

(b) any revocation or quashing.

(4) Except as provided for in subsection (5) or (6), TPIM proceedings may neither continue nor be begun after expiry or repeal.

(5) TPIM proceedings of a kind set out in subsection (7) may continue, or be begun, after expiry or repeal, but only for the purpose of determining one or more of the following matters -

(a) whether a TPIM notice should be quashed;

(b) whether measures imposed by a TPIM notice should be quashed;