Division 1 does not apply to the discharge of oil from a ship if--
(a) the oil escaped from the ship in consequence of unavoidable damage to the ship or its equipment, and
(b) all reasonable precautions were taken after the occurrence of the damage or the discovery of the discharge for the purpose of preventing or minimising the escape of the oil.
Editor's note : See Reg 4.2 of Annex I of MARPOL.