Requires the Attorney General to begin immigration removal proceedings promptly after U.S. Immigration and Customs Enforcement serves a Notice to Appear (NTA), require an even faster start for people convicted of deportable offenses, and direct the Attorney General to take all actions (including regulations and guidance) so that those immigration court cases are completed within 15 days of initiation. The provision mandates operational and regulatory steps to meet the 15-day case-completion target for these removal proceedings.