Final answer:
Restraints are permitted under the mental health standard only when necessary to prevent harm and must be the least restrictive option, and their use must be carefully documented and reviewed.
Step-by-step explanation:
According to the mental health standard, restraints are permitted only when they are deemed necessary to prevent a patient from harming themselves or others. Restraint usage must be carefully monitored and used as a last resort after other techniques have been considered and determined to be ineffective. The standard emphasizes the importance of safety, the use of the least restrictive restraint possible, and requires that the action taken be documented and reviewed to ensure compliance with policies governing the use of restraints.