20. (1) The parties to a data-sharing agreement shall review the operation of the agreement on a regular basis, with each such review being carried out on a date that is not more than 5 years from—

(a) in the case of the first such review under this subsection, the date on which the agreement came into effect in accordance with section 61 (in this section referred to as the “effective date”), and

(b) in the case of each subsequent review under this subsection, the date of the previous review under this subsection.

(2) A review under subsection (1) shall consider the impact of the technical, policy and legislative changes that have occurred since the date of the previous review under that subsection or, in the case of the first review under that subsection, the effective date.

(3) Where the parties to a data-sharing agreement consider that it is appropriate following completion of a review under subsection (1), they shall prepare a draft amendment agreement to take account of the technical, policy and legislative changes that have occurred since the date of the previous review under that subsection or, in the case of the first review under that subsection, the effective date.

(4) A draft amendment agreement prepared in accordance with subsection (3) shall be submitted for review in accordance with Chapter 2 of Part 9.