Resumption of spectrum rights by agreement
17.—(1)  The Authority may resume a spectrum right, or a part of a spectrum right, under an agreement entered into with the person granted the spectrum right.
(2)  Without limiting the matters that may be included in the agreement, if a part of the spectrum right is to be resumed, the agreement must specify the variations to the other conditions of the spectrum right that will be made to give effect to the agreement and the date on which the resumption is to take effect.
(3)  If a part of the spectrum right is resumed, the Authority shall vary, in a way that gives effect to the variations specified in the agreement, the other conditions of the grant of spectrum right.
(4)  For the purposes of this regulation and regulation 18, “resume”, in relation to a grant of any spectrum right or part of a spectrum right, means to revoke or vary any condition relating to —
(a)the range of the radio frequencies comprised in the grant of the spectrum right;
(b)the duration of the grant of the spectrum right; and
(c)the geographical area covered by the grant of the spectrum right.