Procedure for revocation or suspension of permit
25.—(1)  Before the Commissioner —
(a)revokes or suspends an installation permit under section 11(2) or (3) of the Act;
(b)revokes or suspends an operating permit under section 22(2) or (3) of the Act; or
(c)revokes or suspends a modification permit under section 29(2) or (3) of the Act,
the Commissioner shall give the holder of the permit notice in writing of his intention to do so and shall in such notice call upon the holder of the permit to show cause within such time as may be specified in the notice (not being less than 7 days from the date of the notice) as to why the permit should not be revoked or suspended, as the case may be.
(2)  If the holder of the permit —
(a)fails to show cause within the period of time given to him to do so or such extended period of time as the Commissioner may allow; or
(b)fails to show sufficient cause,
the Commissioner shall give to the holder of the permit notice in writing of the date from which the revocation or suspension of the permit shall take effect.