---
kind: "section"
citation: "40 C.F.R. § 63.5992"
title: "40"
number: "63.5992"
heading: "When must I conduct subsequent performance tests?"
url: "https://uscodex.org/cfr/40/63.5992"
---

# §63.5992. When must I conduct subsequent performance tests?


If you use a control system (add-on control device and capture system) to meet the emission limitations, you must also conduct a performance test at least once every 5 years following your initial compliance demonstration to verify control system performance and reestablish operating parameters or operating limits for control systems used to comply with the emissions limits.


## Notes

### Amendments

[67 FR 45598, July 9, 2002, as amended at 89 FR 94908, Nov. 29, 2024; 91 FR 37276, June 22, 2026]

### Source

Source: 67 FR 45598, July 9, 2002, unless otherwise noted.

### Authority

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

### Source

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

### Amendments

[67 FR 45598, July 9, 2002, as amended at 89 FR 94908, Nov. 29, 2024; 91 FR 37276, June 22, 2026]