On March 7, the SEC proposed Regulation SCI to require certain SROs, alternative trading systems, disseminators of market data under certain National Market Systems plans and clearing agencies exempt from SEC regulation to have comprehensive policies and procedures in place surrounding their technological systems.  The proposed Regulation SCI would replace the current voluntary compliance program with enforceable rules designed to better insulate securities markets from vulnerabilities posed by systems technology issues.  Comments must be submitted within 60 days after publication in the Federal Register.  SEC Release.  SEC Proposed Rules.