EPA is promulgating this significant new use rule (SNUR) under section 5(a)(2) of the Toxic Substances Control Act (TSCA) for elemental mercury (CAS No. 7439-97-6) used in certain convenience light switches, anti-lock braking system (ABS) switches, and active ride control system switches. This action will amend 40 CFR part 721 and require persons who intend to manufacture (defined by statute to include import) or process elemental mercury for a use designated by this rule as a significant new use to notify EPA at least 90 days before commencing the manufacturing or processing of the chemical substance for such significant new use. The required notification will provide EPA with the opportunity to evaluate the intended use and, if necessary, to prohibit or limit that activity before it occurs. In addition, in order to display the OMB control number for the information collection requirements contained in this final rule, EPA is amending the table of Office of Management and Budget (OMB) approval numbers for EPA regulations that appears in 40 CFR part 9.