There are a number of rules, regulations and guidelines by which prisons are run. These are outlined in Prison Service Instructions (PSIs) and Prison Service Orders (PSOs).
Prison Service Instructions
Prison Service Instructions are mandatory instructions which have a definite expiry date. They are also used to introduce amendments to Prison Service Orders.
Prison Service Orders
Prison Service Orders are long-term mandatory instructions which are intended to last for an indefinite period. Please check for changes and updates in the Numerical Index.
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