StacksVerified U.S. regulatory reference

33 CFR §159.115

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)The device must be held at a temperature of 60 °C or higher for a period of 16 hours.
  2. (b)The device must be held at a temperature of −40 °C or less for a period of 16 hours following winterization in accordance with manufacturers' instructions.