CFR›Title 17›Chapter II›Part 242›Subject Group Regulation ATS—Alternative Trading Systems ContainsSections 242.300–242.304CorpusDaily eCFRDisplayed edition2026-08-06Last updated2026-08-06 Sections 242.300 § 242.300 Definitions. 242.301 § 242.301 Requirements for alternative trading systems. 242.302 § 242.302 Recordkeeping requirements for alternative trading systems. 242.303 § 242.303 Record preservation requirements for alternative trading systems. 242.304 § 242.304 NMS Stock ATSs. Previous Regulation AC—Analyst Certification Regulation AC—Analyst Certification Next Regulation M Regulation M