Section 8(3)(b) in The Airports Economic Regulatory Authority of India (Salary, Allowance And Other Conditions Of Services Of Secretary) Rules, 2009
(b)if full hospitality (i.e., lodging and boarding) is provided by the host organisation of official agencies, Indian Missions, the incidental expenses would be US$ 100 per diem for the entire period of stay. In case of Nepal, the same would be US$ 50 per diem. In such a case, economy cut, if any, as applicable to the Central Government officers shall also apply at the rate of US$ 100 or US$ 50, as the case may be.