3.—Upon the provision or procuration by it of the facilities referred to in section 2, the Institute shall—

(a) in accordance with such methods as shall be prescribed, proof all firearms presented to it for that purpose under this Act,

(b) apply to all firearms proofed by it under this Act (if found of proof) such mark or marks as shall be prescribed,

(c) charge to a person presenting to it firearms for proofing under this Act such fees as shall be prescribed.