8.—(1) Every intradermal test shall be carried out by way of a Schick Test and such Test shall be carried out only if, in the opinion of a medical practitioner, such Test is necessary.
(2) In every case where a Schick Test has been carried out, the person carrying out such Test shall take a reading between the sixth and eighth day after such Test.
(3) Any person showing a positive reaction to the Schick Test shall forthwith be given primary diphtheria vaccination.