10 CFR 40 - "Domestic Licensing of Source Material"

The U.S. Nuclear Regulatory Commission (NRC) regulations in Part 40 of Title 10 of the Code of Federal Regulations establish procedures and criteria for the issuance of licenses to receive title to, receive, possess, use, transfer, or deliver source and byproduct material. The application, reporting, recordkeeping, and third party notification requirements are necessary to permit the NRC to make a determination as to whether the possession, use, and transfer of source and byproduct material is in conformance with the Commission’s regulations for protection of public health and safety.

The latest form for 10 CFR 40 - "Domestic Licensing of Source Material" expires 2022-07-31 and can be found here.