(1) An access regime—
(a) comes into force—
(i) subject to subparagraph (ii) on the day on which the particulars are published in accordance with section 15, or
(ii) the date specified in the particulars establishing the access regime;
(b) may be varied as provided in section 17.
(2) An access regime ceases to be in force on—
(a) the prescribed expiry date;
(b) revocation of the access regime;
(c) voluntary cessation of operation of the designated funds transfer system or designated settlement system;
(d) dissolution of the designated funds transfer system or designated settlement system; or
(e) revocation or suspension of designation of the funds transfer system or settlement system to which the access regime applies.