Lighters or other similar devices containing flammable gas (e.g. lighters for fireplaces and torches) may not be transported to, from or within the United States, unless the design of the device has been examined and tested by a person authorized by the appropriate authority of the United States (see US 1). For design samples being submitted for examination and testing, see 49 CFR 173.308.

Approval numbers issued by the appropriate authority of the United States (see US 1) prior to 1 January 2007 are no longer valid and each lighter design currently in production must be re-examined and tested under the provisions of 49 CFR 173.308.