The Chicago Board Options Exchange, Incorporated (CBOE) is proposing to amend CBOE Rule 8.85 relating to the continuous quoting obligations of Designated Primary Market-Makers (DPMs). The CBOE proposes to modify the continuous electronic quoting obligation of DPMs in multiply-listed option classes by reducing the continuous electronic quoting obligation from 100% of the series of each appointed option class to 90% of the series of each appointed option class. This modification would make the continuous quoting obligations of DPMs consistent with the continuous quoting obligations of e-DPMs (see CBOE Rule 8.93) and Lead Market-Makers in Hybrid option classes (see CBOE Rule 8.15A).

 http://www.sec.gov/rules/sro/cboe/2007/34-56824.pdf