Grant of licences by Railways to run food stalls at Railway platforms. Cannot be granted on ad hoc basis. People who come within Zone of consideration have legitimate expectatation to put in application and compete to qualify to obtain licence. Writ petition by public spirited persons challenging action of railway authorities in awarding catering licences is maintainable. [ Mahendra Kumar Tiwari vs Union of India. AIR 1998 M.P. 178 = 1998(1) MPLJ 268. A.K.Mathur {CJ}& Dipak Misra {J}]