Answer:
The Act Prohibiting Importation of Slaves of 1807 (2 Stat. 426, enacted March 2, 1807) is a United States federal law that provided that no new slaves were permitted to be imported into the United States. It took effect on January 1, 1808, the earliest date permitted by the United States Constitution.
Step-by-step explanation:
Long title: AN ACT to prohibit the importation of ...
Enacted by: the 9th United States Congress
Effective: January 1, 1808