Voluntary payments.
Section 20
SEC. 20. Voluntary payments.—Payments made by the employer or his insurer to the injured laborer during the period of his disability or to his dependents, which under the provisions hereof were not due or payable when they were made, shall, upon being duly established, by agreement between the parties concerned, a certified copy of which shall be sent to the Bureau of Labor, or subject to the decision of the court in case of litigation, be deducted from the sum to be paid as compensation: Provided, That in case of disability, the deduction shall be made by reducing the period of time during which the compensation is to be paid, and not by reducing the weekly payment to be made in accordance with sections fourteen, fifteen, sixteen, and seventeen of this Act.