(1) Compensation under section 4 shall be paid as soon as it falls due.

(2) In cases where the employer does not accept the liability for compensation to the extent claimed, he shall be bound to make provisional payment based on the extent of liability which he accepts, and, such payment shall be deposited with the Commissioner or made to the workman, as the case may be, without prejudice to the right of the workman to make any further claim.

(3) Where any employer is in default in paying the compensation due under this Act within one month from the date it fell due, the Commissioner may direct that, in addition to the amount of the arrears, simple interest at the rate of six per cent. per annum on the amount due together with, if in the opinion of the Commissioner there is no justification for the delay, a further sum not exceeding fifty per cent. of such amount, shall be recovered from the employer by way of penalty.]