(a)This subpart establishes procedures for the designation of agencies to issue certificates and certifications for types of packagings designed, manufactured, tested, or maintained in conformance with the requirements of this subchapter, subchapter C of this chapter, and standards set forth in the United Nations (U.N.) Recommendations (Transport of Dangerous Goods), and for lighters, portable tanks, multi-element gas containers, and Division 1.4G consumer fireworks in conformance with the requirements of this subchapter. Except for certifications of compliance with U.N. packaging standards, this subpart does not apply unless made applicable by a rule in subchapter C of this chapter.