(1)  A certificate authorising the use of a boiler shall cease to be in force,—

   (a)  on the expiry of the period for which it was granted; or

   (b)  when any accident occurs to the boiler; or

   (c)  when the boiler is moved, except a vertical boiler, the heating surface of which is less than twenty square metres, or a portable or vehicular boiler; or

   (d)  save as provided in section 17, when any structural alteration, addition or renewal is made in or to the boiler; or

   (e)  in case the Chief Inspector in any particular case so directs, when any structural alteration, addition or renewal is made in or to any steam-pipe attached to the boiler; or

   (f)  on the communication to the owner of the boiler of an order of the Chief Inspector or the Inspector prohibiting its use on the ground that it or any boiler components attached to it is in a dangerous condition.

   (2)  An order made under clause (f) of sub-section (1) shall contain the grounds on which the order is made and the same shall be communicated to the owner.

   (3)  When a certificate ceases to be in force, the owner of the boiler may make an application to the competent person for renewal thereof in such form, along with such documents and fee as may be specified by regulations.

   (4)  On receipt of an application under sub-section (3), the competent person shall, within fifteen days from the date of such receipt, inspect the boiler in such manner as may be specified by regulations.

   (5)  If the competent person is,—

   (a)  satisfied that the boiler and the boiler components attached thereto are in good condition, he shall grant a certificate for such period as may be specified by regulations;

   (b)  of the opinion that the boiler or boiler components, or both, does not conform to the standards as may be specified by regulations, he may, for reasons to be recorded in writing, refuse to grant the certificate:

   Provided that no certificate shall be refused unless the inspecting authority had directed the owner of the boiler or the boiler components, or both, in writing to carry out such modifications or rectifications as it deems necessary and the competent person is of the opinion that inspite of such direction, the owner of the boiler or boiler components, or both, has not carried out the modifications or rectifications:

   Provided further that the competent person shall, within forty-eight hours of making the inspection under sub-section (4), inform the owner of the boiler or boiler components, or both, any defect or deficiency in his opinion and the reasons therefor and shall forthwith inform the Chief Inspector about such defect or deficiency.

   (6)  The Chief Inspector, on receipt of an information under sub-section (5), may, subject to the provisions of this Act and the regulations made thereunder, order the renewal of the certificate on such terms and conditions as may be specified by regulations or may refuse to renew it:

   Provided that where the Chief Inspector refuses to renew a certificate, he shall forthwith communicate his refusal to the owner of the boiler, together with the reasons therefor.

   (7)  Nothing in this section shall be deemed to prevent an owner of a boiler from applying for a renewal certificate therefor at any time during the currency of a certificate.