(1) The employer or a majority of the employees or any trade union representing a substantial number of employees in any industrial establishment in respect of which festivals have been specified under section 3, may, at any time, apply to the Inspector for a change in all or any of the festivals so specified.
(2) The application for changing the specified festivals shall be sent to the Inspector having jurisdiction over the area in which the industrial establishment is situated in Form No. IV in duplicate.
(3) The provisions of rule 3 shall, mutatis mutandis apply to the change of festivals under this rule.
(4) The change made by the Inspector in the specified festivals under this rule shall be communicated to the employer in Form No. III in duplicate. The employer shall, within seven days of receipt of the communication, exhibit in his industrial establishment a copy thereof in such manner as can be readily seen and read by the employees. The festivals so changed by the Inspector shall take effect from the 1st day of the calendar year immediately following the year in which such change is effected.