If a blood sample is taken by a registered medical practitioner for the purposes of the Act—
(a) the sample must be obtained by venipuncture; and
(b) the site of the puncture must be cleansed with a swab taken from a container that—
(i) is sealed against contamination; and
(ii) bears a label stating that the container holds an aqueous solution of chlorohexidine and cetrimide and no methylated spirits, alcohol, tincture of iodine or other substance containing alcohol.