An organisation with appropriate expertise in security matters and with appropriate knowledge of ship and port operations authorized to carry out an assessment, or a verification, or an approval or a certification activity, required by SOLAS chapter XI-2 or by part A of the ISPS Code. RSOs can be approved by flag State Administrations to: (1) carry out ship security assessments; (2) prepare ship security plans; (3) review and approve ship security plans, or amendment to Plans; and (4) carry out initial and subsequent verifications of ships. RSOs approved by some flag States include classification societies and private security firms.

Every ship becomes eligible for a periodic inspection as follows: (1) High Risk Ship (HRS): between 5 and 6 months after the last inspection in the PMoU region; (2) Standard Risk Ship (SRS): between 10 and 12 months after the last inspection in the PMoU region; (3) Low Risk Ship (LRS): between 24 and 36 months after the last inspection in the PMoU region. The time span for the next periodic inspection re-starts after any inspection.

A code number for the applicable control action. Examples are: 10: Deficiency rectified; 15: Rectify deficiency at next port; 16: Rectify deficiency within 14 days; 17: Master instructed to rectify deficiency before departure; 18: Rectify non-conformity within 3 months; 19: Rectify major non-conformity before departure; 30: Grounds for detention; 40: Next port of call informed; 50: Flag State/consul informed; 70: Classification society informed; 85: Investigation of contravention of discharge provisions in MARPOL.


A signed undertaking given by cargo receivers stating that, in return for delivery to them or to their order of the goods noted in the bond, they agree to pay the proper proportion of any general average charges (and salvage or special charges) which may thereafter be ascertained to be due from the goods. Lloyd's Average Bond form (LAB 77) is normally used.