31A.—(1) Any officer of the Bureau, immigration officer or police officer not below the rank of sergeant may, if he reasonably suspects any person to have committed an offence under section 8(b), require that person to provide specimens of his hair for a hair test to be conducted under this section.
(2) A person who fails, without reasonable excuse, to provide specimens of his hair of such type and quantity as may be required by any of the officers referred to in subsection (1) shall be guilty of an offence.
(3) All specimens of hair provided under this section shall be marked and sealed for hair testing in accordance with the prescribed procedure.
(4) A certificate stating the result of a hair test shall be signed by an analyst employed by the Health Sciences Authority or any other person that the Minister, by notification in the Gazette, appoints for such purpose.
(5) The certificate stating the result of a hair test may be signed by an analyst or person appointed under subsection (4) notwithstanding that he did not personally conduct the test to analyse the specimens of hair as long as the test was conducted by another person acting under his direction.