# (2S)-5-Oxopyrrolidine-2-carboxylic Acid (L-PCA); Exemption From the Requirement of a Tolerance
> **Rule** · Final rule. · Published 2023-08-10 · Effective 2023-08-10 · 88 FR 54244
## Document
- **Document number:** 2023-17135
- **Category:** pesticide
- **Federal Register citation:** 88 FR 54244
- **CFR reference:** 40 CFR 180
- **Publication date:** 2023-08-10
- **Effective date:** 2023-08-10
- **EPA docket:** EPA-HQ-OPP-2018-0158
## Abstract

This regulation establishes an exemption from the requirement of a tolerance for residues of (2S)-5-Oxopyrrolidine-2-carboxylic Acid (L-PCA) in or on all food commodities when used as a plant growth regulator in accordance with label directions and good agricultural practices. Exponent, on behalf of Verdesian Life Sciences U.S., LLC, submitted a petition, pursuant to the Federal Food, Drug, and Cosmetic Act (FFDCA), asking the EPA to amend its regulations to establish an exemption from the requirement of a tolerance for residues of the pesticide, when used as a plant growth regulator on agricultural crops, turf and ornamental plants. Instead, EPA is establishing an exemption from the requirement of a tolerance for residues L-PCA in or on all food commodities when applied in buffered end-use products and used in accordance with label directions and good agricultural practices. This regulation eliminates the need to establish a maximum permissible level for residues of L-PCA when used in accordance with this exemption.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2023/08/10/2023-17135/2s-5-oxopyrrolidine-2-carboxylic-acid-l-pca-exemption-from-the-requirement-of-a-tolerance)
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