249. (1) If no application is made to the Tribunal for a review of the Minister's decision to approve an application or of a decision of the Executive under section 240 or 241, respectively, within 28 days after the date of the decision, the approval takes effect—
(a) 7 days after the last day on which a person may apply to the Tribunal for a review of the decision; or
(b) if, before the expiration of the period referred to in paragraph (a), the Minister gives the applicant written notice that no application has been made to the Tribunal—on the day on which that notice is given;
whichever occurs first.
(2) If application is made to the Tribunal for a review of the Minister's decision to approve an application or of a decision of the Executive under section 240 or 241, respectively, within 28 days after the date of the decision, the approval takes effect on the date on which the Tribunal's decision affirming or varying the decision comes into operation.