In order to mitigate conflicts of interest, not later than 180 days after July 21, 2010, the Securities and Exchange Commission shall adopt rules which may include numerical limits on the control of, or the voting rights with respect to, any clearing agency that clears security-based swaps, or on the control of any security-based swap execution facility or national securities exchange that posts or makes available for trading security-based swaps, by a bank holding company (as defined in section 1841 of title 12) with total consolidated assets of $50,000,000,000 or more, a nonbank financial company (as defined in section 5311 of title 12) supervised by the Board of Governors of the Federal Reserve System, affiliate of such a bank holding company or nonbank financial company, a security-based swap dealer, major security-based swap participant, or person associated with a security-based swap dealer or major security-based swap participant.