StacksVerified U.S. regulatory reference

16 CFR §1611.3

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The rate of burning shall not exceed 1.2 in./sec as judged by the average of five determinations lengthwise and five determinations transverse to the direction of processing, when the material is tested with the SPI flammability tester in accordance with the method described in § 1611.4.