I heard about this new labor law more than 3 years now, no body know when they will issue the Famous law, but maybe soon cause UN are talking about it now as human right.I think the best way is to ask for a increasing salary in a proper way, and if they refuse it, you have to wait few month and at the end of your contract don't renew with them and ask for NOC. Or renew your contract with them in a higher salary.Anyway good luck