The license requirement for trading oxygen cylinders in India is regulated to ensure safe handling, storage, and distribution of compressed gases. Businesses must obtain necessary approvals under the Gas Cylinders Rules, 2016 and comply with safety standards set by the Petroleum and Explosives Safety Organisation. Depending on the nature of operations, additional registrations such as trade license and safety certifications may be required. Obtaining the proper license ensures legal compliance, safe operations, and protection of public health while dealing with oxygen cylinders.