When rentals shall be paid.
Section 304
SEC. 304. When rentals shall be paid. — The rental shall be paid within twenty days after the end of each calendar quarter and shall be collected by the Bureau of Internal Revenue as a tax. If at any time payment shall not be made when the same shall have become due, said rental shall be increased by twenty-five per centum and together with the penalty shall become a lien upon the right of use of water and all the works, lands, buildings, and machinery which constitute the property appurtenant thereto, which lien shall be enforced in the manner prescribed in Title IX of this Code.