All ships must be surveyed and verified by officers of the Flag State Administrations or their recognised organisations – in the UK this will involve a Flag State inspection by a surveyor from the MCA, or by a surveyor of Lloyd's Register acting as the MCA's agent. In this respect, SOLAS is not the only Convention to be applied, but also SOLAS, MARPOL, BWM and MLC, among others. The principal ship certificates issued under provisions of the SOLAS Convention comprise: