The objects of this Act are as follows:

(a) to provide for the assessment, treatment and care of persons with mental illnesses;

(b) to provide for appropriate oversight and safeguards in relation to such assessment, treatment and care;

(c) to give everyone involved with such assessment, treatment and care clear direction as to their rights and responsibilities;

(d) to provide for such assessment, treatment and care to be given in the least restrictive setting consistent with clinical need, legal and judicial constraints, public safety and patient health, safety and welfare;

(e) to promote voluntary over involuntary assessment and treatment and the making of free and informed assessment and treatment choices;

(f) to provide for all incidental and ancillary matters.