(1) Subject to subsection (2), the rules governing the use of a registered certification trade mark may be varied in accordance with the regulations.
(2) The rules governing the use of a certification trade mark shall not be varied without the approval of the Registrar.
(3) Before deciding to approve a variation in the rules governing the use of a certification trade mark the Registrar shall be satisfied that the rules as varied—
(a) would not be detrimental to the public;
(b) are satisfactory having regard to the criteria prescribed under section 152 (2)(b).
(4) The Registrar shall—
(a) notify the registered owner of the certification trade mark in, writing, of his or her decision to approve or not to approve the variation of the rules governing the use of a certification and trade mark; and
(b) cause notice, if applicable, of any variation in the rules, to be published in the Gazette.