(1) If a person appears to require treatment in a mental hospital and if he, or in the case of a person under the age of 16 years, his parent or guardian-
(a) is desirous that such person should receive such treatment; and
(b) completes an application in writing; and
(c) lodges the application with a medical superintendent,
the medical superintendent may admit such person as a voluntary patient.
(2) A voluntary patient-
(a) shall be entitled to leave the mental hospital after the expiration of 7 days from his, or if he is under the age of 16 years, his parent or guardian, giving notice in writing; or, in the discretion of the medical superintendent, verbal notice, to the medical superintendent of the intention of the voluntary patient to leave the mental hospital:
Provided that a medical superintendent may in his absolute discretion discharge a voluntary patient at any time within such period of 7 days; and
(b) shall leave the mental hospital within 72 hours after he, or if he is under the age of 16 years his parent or guardian, has received from the medical superintendent notice in writing, signed by the medical superintendent, stating that the medical superintendent is satisfied that it is not necessary that the voluntary patient should remain in the mental hospital and that the voluntary patient is required to leave the mental hospital.
(3) A person who became a voluntary patient when he was under the age of 16 years shall not remain in a mental hospital as a voluntary patient for more than 28 days after he has attained the age of 16 years unless during such period of 28 days he shall have completed and lodged with the medical superintendent such application as is referred to in subsection (1).
(4) A medical superintendent may detain in a mental hospital, for observation and treatment, a person who has been admitted as a voluntary patient until the expiration of 7 days from the time when such notice as is referred to in subsection (2)(a) has been given or, in the case of a person who was admitted as a voluntary patient when he was less than 16 years of age, until the expiration of 28 days after the voluntary patient has attained the age of 16 years.