All operational ration packs (ORP) components are intended to achieve a minimum of 24 months shelf life after production. A selection of each pack date is sent for analysis by the MOD contracted chemist at the 18 month point. Depending on the recommendations made by the chemist the rations are then recommended for re-inspection in six months, three months or certified as no longer suitable for issue. This process is repeated until the rations are certified as no longer suitable for issue. A monthly report is issued to all units in the armed forces through front line Commands detailing the material condition of each pack date. Action is then taken to ensure that stocks are managed accordingly.