(a) In this chapter, a reference to a federal law or regulation means a reference to the most current version of that law or regulation.
(b) In this chapter, a reference to nomenclature systems developed by the International Union of Pure and Applied Chemistry (IUPAC) or the Chemical Abstracts Service (CAS), or to other information, including information such as classification codes, performance standards, systematic names, standards, and systems described in publications sponsored by private technical or trade organizations, means a reference to the most current version of the publication.