Per August 1, 2005 (law Nº 8593), the following five districts were reallocated to the newly created province Datem del Marañón: Barranca, Cahuapanas, Manseriche, Morona, Pastaza.
According to law Nº 8593 enacted on August 1, 2005, the following five districts were transferred to the newly established province of Datem del Marañón: Barranca, Cahuapanas, Manseriche, Morona, and Pastaza.