1847 Passenger Act (An act to regulate the carriage of passengers in merchant vessels)
Sess. II, Chap. 17; 9 Stat. 128.
29th Congress; February 22nd, 1847.
You can find the full text of this law as a PDF here.
Established standards to be followed by ships carrying passenges to the United States, and penalties for captains not ensuring these standards.