A person who is or has at any time been detained in a retreat may have his term of detention extended, or be re-admitted, in like manner as a habitual drunkard may be admitted under section ten of the Habitual Drunkards Act, 1879, as amended by section four of the Inebriates Act, 1888, and by this Act, except that the statutory declaration therein mentioned shall not be necessary, and that the attesting justice shall not be required to satisfy himself that the applicant is a habitual drunkard.