---
kind: "section"
citation: "10 C.F.R. § 26.51"
title: "10"
number: "26.51"
heading: "Applicability."
url: "https://uscodex.org/cfr/10/26.51"
---

# §26.51. Applicability.


The requirements in this subpart apply to the licensees and other entities identified in § [26.3(a)](/cfr/10/26.3.md?p=a), [(b)](/cfr/10/26.3.md?p=b), and, as applicable, (c) for the categories of individuals in [§ 26.4(a) through (d)](/cfr/10/26.4.md?p=a..d), and, at the licensee's or other entity's discretion, in [§ 26.4(g)](/cfr/10/26.4.md?p=g) and, if necessary, [§ 26.4(j)](/cfr/10/26.4.md?p=j). The requirements in this subpart also apply to the licensees and other entities specified in [§ 26.3(c)](/cfr/10/26.3.md?p=c), as applicable, for the categories of individuals in [§ 26.4(e)](/cfr/10/26.4.md?p=e). At the discretion of a licensee or other entity in [§ 26.3(c)](/cfr/10/26.3.md?p=c), the requirements of this subpart also may be applied to the categories of individuals identified in [§ 26.4(f)](/cfr/10/26.4.md?p=f). In addition, the requirements in this subpart apply to the entities in [§ 26.3(d)](/cfr/10/26.3.md?p=d) to the extent that a licensee or other entity relies on the C/V to satisfy the requirements of this subpart. Certain requirements in this subpart also apply to the individuals specified in [§ 26.4(h)](/cfr/10/26.4.md?p=h). The requirements in this subpart apply to the FFD programs of licensees and other entities identified in [§ 26.3(f)](/cfr/10/26.3.md?p=f) that elect not to implement the requirements in [subpart M](/cfr/10/subpartM.md) of this part for the categories of individuals in [§ 26.4](/cfr/10/26.4.md) and those licensees and other entities that elect to implement the requirements in [§ 26.605](/cfr/10/26.605.md).


## Notes

### Amendments

[91 FR 15777, Mar. 30, 2026]

### Authority

Authority: Atomic Energy Act of 1954, secs. 53, 103, 104, 107, 161, 223, 234, 1701 (42 U.S.C. 2073, 2133, 2134, 2137, 2201, 2273, 2282, 2297f); Energy Reorganization Act of 1974, secs. 201, 202 (42 U.S.C. 5841, 5842); 44 U.S.C. 3504 note.

### Source

Source: 73 FR 17176, Mar. 31, 2008, unless otherwise noted.

### Amendments

[91 FR 15777, Mar. 30, 2026]