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," is hereby amended so as read as follows:
"SECTION 1. Whenever three or more persons, conspiring together, shall form a band of robbers for the purpose of stealing carabaos, cattle, horses, rice, or personal property of any description, or for the purpose of abducting persons, either 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 death or imprisonment for not less than twenty years, in the discretion of the court."