The Anti-Slavery Act of 1793 the Act was passed by the Government of Upper Canada, the first British territory in the New World to pass a law against slavery The Act did not abolish slavery, but granted freedom to all slaves who entered the province with their owners or on their own.  Slaves already living in Canada were not freed.  All children born of slaves after 1793 would become free at the age of 25. Their children would be free at birth.