SECTION 1. Section one of Act Numbered Five hundred and eighteen, entitled "An Act defining highway robbery or brigandage and providing for the punishment therefor," as amended by Act Numbered Eleven hundred and twenty-one, is hereby further amended to read as follows :
''SECTION 1. Whenever three or more persons, conspiring together, shall form a band of robbers for the purpose of stealing fined. carabaos, cattle, horses, rice, or personal property of any description, or for the purpose of extortion or obtaining ransom, or for any other purpose, by means of force and violence, and shall be armed with deadly weapons for this purpose, they shall be deemed highway robbers, or brigands, and every person engaged in the original formation of the band, or joining it thereafter, shall, upon conviction thereof, be punished by imprisonment for not more than twenty years, in the discretion of the court: Provided, however, That if the band shall have committed acts penalized by other laws with a greater punishment, the persons forming such band who, under said laws, shall be responsible for such acts, shall be prosecuted under said laws and upon conviction shall suffer the punishment established therein."