18. Be that as it may, the letter No. BRDB/03/71/2010/GE-I dated 06.04.2015 issued by the Under Secretary to the Government of India, Ministry of Defence, Department of Defence, Border Roads Wing, which is Annexure R-2 of the affidavit filed by the respondent No. 1, states that the President of India has sanctioned the adhoc increase in BCA w.e.f. 01.04.2012 payable to GREF employees serving in Bhutan under Project Dantak in Bhutan in accordance with the Government of India, Ministry of External Affairs letter No. E.IV/235/3/2006 dated 05.06.2014 for officers of the Central and State Governments of India during service on deputation to Bhutan. The letter further stated that revised rates of BCA @ 8% w.e.f. 01.04.2012 and @ 10% w.e.f. 01.04.2013 for different categories, would be as per the chart provided in the letter. As per the chart, in respect of officers drawing Grade Pay of Rs. 6,600/- per month and above, but less than Rs. 8,700/- per month, the BCA rate per month w.e.f. 01.04.2012 would be Rs. 89,561/- and the BCA rate per month w.e.f. 01.04.2013 would be Rs. 99,608/-. As the petitioner had joined his post at Dantak, Bhutan on 26.07.2013 and had remained in the said post till May, 2016, the petitioner would have to be paid his BCA @ Rs. 99,608/- per month. Further, if there had been any enhancement of BCA subsequent to 01.04.2013, the petitioner should have been given the benefit of the same. However, the petitioner has apparently not been given his due entitlement.