10 CFR 40.20 : Energy (§ 1.1 To Parts 1801-1899) — (§ 1.1 To Appendix S To Part 50) — Nuclear Regulatory Commission (§ 1.1 To Appendix S To Part 50) — Domestic Licensing Of Source Material (§ 40.1 To Appendix A To Part 40) — General Licenses (§ 40.20 To § 40.28) — Types of licenses.