regulation). (b) Consolidated audit trail prohibited from accepting market data until mechanisms developed The operator described in paragraph (3) of subsection (a) may not accept market data (or shall cease accepting market data) until the operator has developed the mechanisms required by such subsection. Any requirement for a person to provide market data to the operator shall not apply during any time when the operator is prohibited by this subsection from accepting such data. (c) Treatment of previously developed mechanisms The development of comprehensive internal risk control mechanisms required by subsection (a) may occur, in whole or in part, before the date of the enactment of this section, if such development and such mechanisms meet the requirements of such subsection (including consultation with the Chief Economist).