In any proceedings under this Act, the production by one of the parties—
shall be sufficient evidence of the facts stated in it, unless, in the first-mentioned case, the other party requires that the analyst shall be called as a witness.
In any such proceedings, if a sample of milk has been taken by an officer of one authority at the request of an officer of another authority, a document—
shall, if a copy of it has been served on the defendant with the summons, be sufficient evidence of compliance with those provisions, unless the defendant requires that the officer shall be called for as a witness.
In any such proceedings, if a defendant intends—
notice of his intention, together, in the first-mentioned case, with a copy of the certificate, shall be given to the other party at least three clear days before the day on which the summons is returnable, and, if this requirement is not complied with, the court may, if it thinks fit, adjourn the hearing on such terms as it thinks proper.
Regulations made under section 4 or section 7 may prescribe a method of analysis for the purpose of ascertaining the presence in, or absence from, any food of any substance specified in the regulations, or the quantity of any such substance which is present in any food; and in any proceedings under this Act—
in respect of any food alleged to contain, or not to contain, any substance specified as mentioned above, or any particular quantity of such a substance, evidence of an analysis carried out by the prescribed method shall be preferred to evidence of any other analysis or test.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .