Without the N.O.C,this is the answer to your question. The Advisory Council recommended that expatriate workers leaving Qatar should not be allowed to return for five years from the date of their departure from the country, a step the council said would protect the interests of the sponsors.The change in the article would protect the rights of the first sponsor who bore the cost of bringing the worker to the country. It would be a deterrent for expatriates tempted by better job offers within the country. Accordingly, expat begin to create troubles for their sponsors once they find better chances. I hope it helps.