As used in this part:
(a) School district means the local unit of school administration as defined by the laws of the State in which it is located.
(b) Cooperative school means a school operated under a cooperative agreement between a school district and the Bureau of Indian Affairs in conformance with State and Federal school laws and regulations. (35 Stat. 72, 25 U.S.C. 295) [33 FR 6472, Apr. 27, 1968]