Section 8(3)(d) in The Airports Economic Regulatory Authority of India (Salary, Allowance And Other Conditions Of Services Of Secretary) Rules, 2009
(d)in case of stay beyond seven consecutive days, the per diem from the 8th to 28th days shall be US$ 250 and the rate of per diem for stay beyond twenty eight days consecutively shall be decided on case to case basis keeping in view the facilities provided.