Blue Star — mandatory gas oven checking

I received a printed notice for mandatory checking of gas oven by our distributor blue star, 52/1b (43) g t rd. Bhadrakali, hooghly ph. No.26940096 on 02/02/2020.
In ref. To the matter i want to know, is it authorised by indian oil? As the distributor quote the d. O. No. P/39014/1/86 mkt dt.14/04/1988 and also quote gas connection may disconnect if not done gas checking. For the service they charges rs.200/. Pl. Inform me about the matter.