Law 70 (Law of the Blacks/Ley de Negritudes) was signed in 1993 by the then President César Gaviria Trujillo. The law officially recognized Afro-Colombians as a distinct ethnicity and provided a legal foundation for the defense of Afro-Colombian territorial rights.
Please click the link below to read an English translation of Law 70, translated by Norma Jackson of Benedict College.
http://www.benedict.edu/exec_admin/intnl_programs/other_files/bc-intnl_programs-law_70_of_colombia-english.pdf
Download here