(1) The Secretary of State may by notice (a "variation notice") vary measures specified in a TPIM notice if -

(a) the variation consists of the relaxation or removal of measures;

(b) the variation is made with the consent of the individual; or

(c) the Secretary of State reasonably considers that the variation is necessary for purposes connected with preventing or restricting the individual's involvement in terrorism-related activity.

(1A) The Secretary of State may by variation notice vary a relocation measure so as to substitute a different specified residence if the Secretary of State reasonably considers that -

(a) the variation is necessary for reasons connected with the efficient and effective use of resources in relation to the individual; and

(b) the relocation measure (as varied) remains necessary for purposes connected with preventing or restricting the individual's involvement in terrorism-related activity.