# Citrus Tristeza Virus (CTV) Strain T36 Expressing Spinach Defensin Proteins SoD2, SoD2-1, and SoD2*; Exemption From the Requirement of a Tolerance
> **Rule** · Final rule. · Published 2026-04-07 · Effective 2026-04-07 · 91 FR 17607
## Document
- **Document number:** 2026-06686
- **Category:** pesticide
- **Federal Register citation:** 91 FR 17607
- **CFR reference:** 40 CFR 180
- **Publication date:** 2026-04-07
- **Effective date:** 2026-04-07
- **EPA docket:** EPA-HQ-OPP-2025-0176
## Abstract

This regulation establishes an exemption from the requirement of a tolerance for residues of Citrus tristeza virus (CTV) strain T36 expressing Spinach Defensin Proteins SoD2, SoD2-1, and SoD2* in or on the food and feed commodities of citrus. Silvec Biologics, Inc submitted a petition to EPA under the Federal Food, Drug, and Cosmetic Act (FFDCA) requesting an exemption from the requirement of a tolerance. This regulation eliminates the need to establish a maximum permissible level for residues of CTV strain T36 expressing Spinach Defensin Proteins SoD2, SoD2-1, and SoD2* under FFDCA when used in accordance with this exemption.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2026/04/07/2026-06686/citrus-tristeza-virus-ctv-strain-t36-expressing-spinach-defensin-proteins-sod2-sod2-1-and-sod2)
---
*AI Analytics · CC0 1.0*