(c) any provisions of this Act which are relevant to the particular matter or activity. (5) The Commission shall either register or refuse registration of a voluntary industry code. (6) If registration of a voluntary industry code is refused, then the Commission shall notify the relevant industry forum of its decision in writing and provide the reasons for it. (7) If the Commission neither registers nor refuses to register a voluntary industry code within a period of thirty days from the date that the voluntary industry code was submitted for registration, the Commission is deemed to have refused the registration of the voluntary industry code unless the industry forum receives a written notice of registration of the voluntary industry code after that period. 96. Commission may determine a voluntary industry code. (1) The Commission may determine a voluntary industry code, in accordance with section 55, if— (a) a voluntary industry code is not developed under an applicable section of this Act; and (b) the Commission is satisfied that a voluntary industry code is unlikely to be developed by the relevant industry forum within a reasonable time. (2) The voluntary industry code formulated by the Commission under subsection (1) shall be registered. (3) The voluntary industry code shall only take effect upon registration. 97. Applicable voluntary industry code. (1) The Commission shall ensure that there is only one voluntary industry code in operation that is applicable to a particular matter for a particular person or class of persons at a given time. (2) If there is any uncertainty or ambiguity, a person may apply to the Commission for its opinion on which voluntary industry code is the applicable code in relation to the circumstances of the applicant. (3) The Commission shall provide its opinion within thirty days from the date of receipt of the application. (4) The Commission shall take into account any relevant Ministerial guidelines and any relevant previous opinions. (5) The opinion shall be binding on the Commission and the applicant for a period of three years from the date that the opinion is provided under subsection (3). (6) The Commission shall maintain a register of opinions provided under this section, in accordance with Chapter 6 of this Part. (7) Notwithstanding subsection (5), the Commission may withdraw an opinion under this section if the Commission is satisfied that the nature of the activity engaged in by the applicant has changed materially.