165.—(1) Where it is alleged that the owner of a ship has incurred a liability under section 153 as a result of any discharge or escape of oil occurring, or as a result of any relevant threat of contamination arising, while there was in force a contract of insurance or other security to which such a certificate as is mentioned in section 163 related, proceedings to enforce a claim in respect of the liability may be brought against the person who provided the insurance or other security (in the following provisions of this section referred to as “the insurer”).
(2) In any proceedings brought against the insurer by virtue of this section it shall be a defence (in addition to any defence affecting the owner’s liability), to prove that the discharge or escape, or (as the case may be) the threat of contamination, was due to the wilful misconduct of the owner himself.
(3) The insurer may limit his liability in respect of claims made against him by virtue of this section in like manner and to the same extent as the owner may limit his liability but the insurer may do so whether or not the discharge or escape, or (as the case may be) the threat of contamination, resulted from anything done or omitted to be done by the owner as mentioned in section 157(3).
(4) Where the owner and the insurer each apply to the court for the limitation of his liability any sum paid into court in pursuance of either application shall be treated as paid also in pursuance of the other.
(5) The Third Parties (Rights against Insurers) Act 1930(1) shall not apply in relation to any contract of insurance to which such a certificate as is mentioned in section 163 relates.