Art.135 - Permission to Carry Out Repairs :

(1)No repairs that involve burning, welding, rivetting, other hot work, high speed drilling, chipping, hammering, or other similar operations to any compartment or pipe line which has contained petroleum shall be begun or carried out in any vessel unless a certificate issued from a recognized chemist certifies that he has examined the vessel or such part of the vessel and he finds that it is free from inflammable vapours, and safe for such operations.

(2)The CA's Shipyard shall be sole judge whether or not repairing operations can be done.

(3)carrying up repairs is not allowed for liquefied inflammable gas carriers or dangerous chemicals in bulk carriers.