Indane Gas Supply — ratio required for supply

Sir,
I have been living in Hosur for the past 7 years and working in central silk board at Hosur. I have been getting regular gas supply from Tirumalesha gas agency from Hosur-635 109 from 2001 till date. Recently from April, 2008 they are insisting on the production of ration card for supply. I dont have a ration card as my job is always transferrable. So I produced a certificate stating that I have no ration card from TSO on April and they contined to supply gas till july, 08. But again they demand ration card and stopped my supply. I applied for ration card. Till date they are not giving me the same. Is it the ration card is must for gas supply, if so how they supplied the same for 7 years. Kindly clarify and help me to get the gas supply regularly
Thanking you,
Yours Sincerely,
Dr.P.Somasundaram