---
kind: "section"
citation: "40 C.F.R. § 63.10442"
title: "40"
number: "63.10442"
heading: "Who implements and enforces this subpart?"
url: "https://uscodex.org/cfr/40/63.10442"
---

# §63.10442. Who implements and enforces this subpart?

- (a) This subpart can be implemented and enforced by us, the U.S. EPA, or a delegated authority such as your State, local, or tribal agency. If the U.S. EPA Administrator has delegated authority to your State, local, or tribal agency, then that agency has the authority to implement and enforce this subpart. You should contact your U.S. EPA Regional Office to find out if this subpart is delegated to your State, local, or tribal agency.
- (b) In delegating implementation and enforcement authority of this subpart to a State, local, or tribal agency under [40 CFR part 63](/cfr/40/part63.md), [subpart E](/cfr/40/subpartE.md), the authorities contained in [paragraph (c)](#c) of this section are retained by the Administrator of the U.S. EPA and are not transferred to the State, local, or tribal agency.
- (c) The authorities that will not be delegated to State, local, or tribal agencies include approval of alternatives to the applicability requirements under [40 CFR 63.10382](/cfr/40/63.10382.md), the compliance date requirements in [40 CFR 63.10384](/cfr/40/63.10384.md), and the management practice standards as defined in [40 CFR 63.10390](/cfr/40/63.10390.md).

## Notes

### Source

Source: 72 FR 73623, Dec. 28, 2007, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 7401 et seq.

### Source

Source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.