There are many reasons under the Mental Health Act that warrants a person to be held in the hospital.  Some forms allow for some time for a Psychiatrist to do an assessment of a patient, and other forms may require a patient to be held in hospital involuntarily in order to allow for further assessment and determination/trial of treatment options.  The crisis and CAP staff are well versed in Mental Health Act and would welcome you to ask any questions that you may have.