High Quality Content by WIKIPEDIA articles! The Oil Industry Safety Directorate (OISD) is an organisation supported by all petroleum companies of India, like IOCL, ONGC, BPCL, HPCL, OIL etc. OISD has basically framed rules and guidelines for Safe Distances to be observed for various Facilities in an oil installation. All the new LPG Bottling Plants in India are designed based on the guidelines of OISD. Further, The LPG Plants can be started only after the Clearance of OISD. OISD has also issued guidelines for the safe operations of Petrol Stations in India. The OISD norms for Petrol stations ensures that the Operator has equal responsibility in the operation of Petrol Pump. As on date the Filling Station owner has to issue the hot work permit for every work as per OISD 225 regulations. OISD has issued standards related to Petroleum Installation from OISD 105 to OISD 227. Each and every oil installation managed by oil companies of India have to adhere to the standards. The depots, terminals and LPG bottling plants are regularly inspected and the recommendations are implemented at the earliest.