law: 19. Past liabilities.-
  It shall be the duty of every contractor and every principal employer to ensure that any loan given by such contractor or principal employer to any inter-State migrant workman does not remain outstanding after the completion of the period of employment of such workman under the said contractor or, as the case may be, in the establishment of such principal employer and accordingly every obligation of an inter-State migrant workman to re-pay any debt obtained by him during the period of his employment from the contractor or the principal employer and remaining unsatisfied before the completion of such period shall, on such completion, be deemed to have been extinguished and no suit or other proceeding shall lie in any court or before any authority for the recovery of such debt or any part thereof.