63. Whoever, with intent to cause damage or injury to the public or to any person, or to cause wrongful gain as defined in the ¹[Penal Code] -(a) knowingly counterfeits upon any timber or standing tree a mark used by Forest-officers to indicate that such timber or tree is the property of the Government or of some person, or that it may lawfully be cut or removed by some person; or(b) alters, defaces or obliterates or obliterates any such mark placed on a tree or on timber by or under the authority of a Forest-officer; or(c) alters, moves, destroys or defaces any boundary-mark of any forest or waste-land to which the provisions of this act are applied,shall be punishable with imprisonment for a term which may extend to ²[seven years and shall not be less than two years and shall also be liable to fine which may extend to fifty thousand Taka and shall not be less than ten thousand Taka].