61.— (1) Where there is more than one competent authority for a designated person under section 60, those competent authorities may agree that one of them will act as the competent authority for that person, and references in this Part to a competent authority are to be construed accordingly.

(2) An agreement under this section, in relation to a designated person, takes effect when the competent authority who has agreed to act as the competent authority for the designated person gives notice, in writing, to that person.

(3) An agreement under this section, in relation to a designated person, ceases to have effect when—

(a) any of the parties to the agreement gives notice, in writing, to the other parties of the termination of the agreement,

(b) the agreement expires, or

(c) as a result of the operation of section 60(1), the competent authority who has agreed to act as the competent authority is no longer a competent authority of the person under section 60,

whichever is the earliest.