PHMSA has issued a Final Rule to correct typographical errors and incorrect CFR references and citations; and clarify certain regulatory requirements in the Pipeline Safety Regulations (49 CFR Parts 186-199). Because these amendments do not impose new requirements, notice and public comment procedures were not unnecessary. The final rule is intended to enhance the accuracy and reduce misunderstandings of the specified regulations. The amendments contained in this rule are non-substantive changes, and are effective as of January 29, 2010.