The contract of employment always stipluates the "conditions of services". Payment of salary in consideration of the services that may be rendered by the employees is obviously a condition of service. If, the salary is not timely paid to the employee, it would be difficult for any employee to pull on the livelihood.
Here, since the salaries are not paid to all such employees for considerably long span, it would be advisable in this case to file a suit for recovery before the Civil Court of competent jurisdiction. You will have to pay the Court fees based on the claim that may be made in this behalf and wait until the judgment is pronounced and decree is drawn entitling you to such salary. It is certainly a protracted litigation.
However, if your services are not otherwise dispensed with, you may file an application for interim relief saying that you are neither suspended, removed, dismissed or your services are not otherwise dispensed with. And hence, the salary cannot be withheld. In all probablities, the Court should grant a mandatory injunction after hearing the parties. Such a case arose before the Gujarat High Court, where his lordship justice PD Desaid as he than was passed an order to that effect. Based on such unreported judgment, I was successful in seeking interim mandatory injunction from civil court.
The Industrial Disputes Act is not applicable in your case, otherwise you could file an application under Section 33 (C) (2) of the Industrial Disputes Act for recovery of money due and for which the Labour Court has power, authority and jurisdiction to compute the monetary benefits and issue the recovery certificate.