142.—(1) This section applies where a person is taken to a hospital under section 139.
(2) The person may be detained under this section in the hospital by a constable for the purpose of enabling the person to be examined by a medical practitioner and interviewed by an approved social worker, if the constable reasonably believes that the detention conditions are met (see section 144).
(3) If at any time while the person is detained in a hospital under this section it appears to the constable detaining the person that the detention conditions are no longer met, the person must immediately be discharged from detention under this section.
(4) Subsection (3) does not apply if the transfer conditions in section 145 are met and the person is taken to another place of safety under that section.
(5) See also section 146 (maximum period of detention under this Part).