(a) A patient who is admitted to an emergency receiving facility shall be examined by a physician as soon thereafter as possible but in any event within 48 hours and may be given such emergency treatment as is indicated by good medical practice. The patient must be discharged within 48 hours of his admission unless:

(1) An examining physician or psychologist concludes that there is reason to believe that the patient may be a mentally ill person requiring involuntary treatment and executes a certificate to that effect within such time; or

(2) The patient is under criminal charges, notice of which has been given in writing to the facility, in which case the provisions of Code Section 37-3-95 shall apply.

Nothing in this chapter shall be construed to prohibit a physician or psychologist who previously executed a certificate authorized by the provisions of this chapter from executing any other certificate provided for in this chapter for the same or any other patient.

(b) Within 24 hours of the execution of the certificate under paragraph (1) of subsection (a) of this Code section, the patient shall be transported, as provided in Code Section 37-3-101, to an evaluating facility where he shall be received pursuant to Code Section 37-3-63 unless the patient has been determined and certified to meet all of the outpatient treatment requirements of paragraphs (1) and (2) of subsection (c) of Code Section 37-3-90, in which event the patient shall be discharged under the conditions provided in Code Section 37-3-91, except that if the patient is under criminal charges, notice of which has been given in writing to the facility, the provisions of Code Section 37-3-95 shall apply.

(c) Notice of any proposed discharge shall be given to the patient and his representatives; if the patient was admitted to the facility under subsection (a) of Code Section 37-3-41, to the physician or psychologist who executed the certificate; if the patient was admitted to the facility under subsection (b) of Code Section 37-3-41, to the court which issued the order; and, if the patient was under criminal charges, written notice of which had been given to the facility, by certified mail or statutory overnight delivery to the law enforcement agency originally having custody of the patient.