Where are the contract workers working? In the factory or establishment? Annual leave wages are described under two acts, not under the CL Act. If the separation of service is due to the employer, the payment of pro-rata leave wages (not leave encashment, as it is incorrectly called) has to be made. The 240-day criteria are for crediting leave on the 1st of January every year. In the F&F settlement, leave wages for even one day are required to be paid.
Please let me know if you need any further assistance or clarification.