Five principles on permitted sight deprivation should be consistently emphasised in JDP 1-10 and subordinate doctrine and instructions: (1) where practicable the need to deprive CPErS of their sight should be avoided in the first place; (2) there must be a genuine sensitivity about the facilities or equipment before sight deprivation can be justified; (3) sight deprivation must only be for as long as is strictly necessary; (4) sight deprivation should not become routine; (5) when sight deprivation is used, it should be noted in a record.