StacksVerified U.S. regulatory reference

43 CFR §3175.42

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Chart recorders used in conjunction with approved differential-type meters that are installed, operated, and maintained in accordance with the standards in § 3175.90 are approved for use for low-volume and very-low-volume FMPs only, and are not approved for high-volume or very-high-volume FMPs.