Which code allows for a 72-hour mental health detention by police?

The correct answer is found in the Welfare and Institutions Code 5150, which specifically allows law enforcement officers to detain an individual for a 72-hour evaluation when that person is deemed to be a danger to themselves or others due to a mental health issue. This provision aims to protect individuals who may be experiencing a mental health crisis, providing necessary intervention and evaluation to ensure their safety and well-being.

Welfare and Institutions Code 5150 outlines the criteria and procedures for such detentions, emphasizing the importance of mental health assessments in crisis situations. By enabling a temporary hold for evaluation, this code seeks to connect individuals to mental health services and support systems that might be vital to their recovery.

The other codes mentioned pertain to different aspects of law, particularly issues related to substance abuse and controlled substances, and do not provide authority for mental health detention. Therefore, they do not apply to the context of a 72-hour mental health evaluation.