In addition to NFPA 58, §§5.2.1.1 and 5.2.2, a licensee or the licensee's employees shall not introduce LP-gas into any container or cylinder if the licensee or employee has knowledge or reason to believe that such container, cylinder, piping, or the system or the appliance to which it is attached is unsafe or is not installed in accordance with the statutes or the rules in this chapter.
16 Tex. Admin. Code § 9.135