"SECTION 125. Amusement Taxes. - There shall be collected from the proprietor, lessee or operator of cockpits, cabarets, night or day clubs, boxing exhibitions, professional basketball games, Jai-Alai and racetracks, a tax equivalent to:

"(a) Eighteen percent (18%) in the case of cockpits;

"(b) Eighteen percent (18%) in the case of cabarets, night or day clubs;

"(c) Ten percent (10%) in the case of boxing exhibitions: Provided, however, That boxing exhibitions wherein World or Oriental Championships in any division is at stake shall be exempt from amusement tax: Provided, further, That at least one of the contenders for World or Oriental Championship is a citizen of the Philippines and said exhibitions are promoted by a citizen/s of the Philippines or by a corporation or association at least sixty percent (60%) of the capital of which is owned by such citizens;

"(d) Fifteen percent (15%) in the case of professional basketball games as envisioned in Presidential Decree No. 871: Provided, however, That the tax herein shall be in lieu of all other percentage taxes of whatever nature and description; and

"(e) Thirty percent (30%) in the case of Jai-Alai and racetracks of their gross receipts, irrespective of whether or not any amount is charged for admission.

"For the purpose of the amusement tax, the term 'gross receipts' embraces all the receipts of the proprietor, lessee or operator of the amusement place. Said gross receipts also include income from television, radio and motion picture rights, if any. A person or entity or association conducting any activity subject to the tax herein imposed shall be similarly liable for said tax with respect to such portion of the receipts derived by him or it.

"The taxes imposed herein shall be payable at the end of each quarter and it shall be the duty of the proprietor, lessee or operator concerned, as well as any party liable, within twenty (20) days after the end of each quarter, to make a true and complete return of the amount of the gross receipts derived during the preceding quarter and pay the tax due thereon.