(a) forges or counterfeits any mark of a type used on any instrument for the purposes of this Act, or
(b) applies to any instrument a mark which he or she knows to be forged or counterfeit, or
(c) knowingly uses, sells, utters or disposes of any instrument with such forged or counterfeit mark thereon, or any mark liable to be confused with marks authorised under the provisions of this Act,
