Wyo. Stat. § 30-2-603: Flammable liquids; flame safety and electric lamps.

(a) Naphtha or other flammable liquids in lamp houses shall be kept in approved containers or other safe dispensers approved by the inspector.

(b) Flame safety lamps shall be permissible and maintained in permissible condition. All flame safety lamps shall be checked by the persons using them and by a qualified lamp attendant, or by a mine examiner, immediately before entering the mine.

(c) When not in service, flame safety lamps and electric lamps shall be under the charge of a responsible company employee.