Section 13
SEC. 13. The grantee, his lessees, successors, or assigns shall pay into the treasury of the Province of Ambos Camarines, in consideration of the granting of this franchise, one and one-half per centum of the gross income earned by the tramway or resulting from its operation. One per centum of the gross income so paid into the provincial treasury shall be paid by the provincial treasurer to the municipality of Knot for municipal purposes, and the remaining one-half per centum of said gross income and earnings shall be retained in the provincial treasury for provincial purposes. The percentage of gross income and gross earnings of said tramway required by this section to be paid into the treasury of Ambos Camarines by the grantee, his lessees, successors, or assigns shall be due and payable quarterly after said tramway shall have been put in operation for the whole or any part of its length.