Such injunction shall remain in full force and effect until (1) the delinquent contributions, interest or penalties have been paid, or (2) the employer shall have furnished a good and sufficient bond conditioned upon the payment of such delinquencies in such an amount and containing such terms as may be determined by the court, or (3) the employer has entered into a plan for the liquidation of such delinquencies as the court may approve: Provided, That such injunction may be reinstated upon the employer's failure to comply with the terms of said plan.
43 P.S. § 789