OFFICES AND OFFICERS ‑- COUNTY ‑- COMMISSIONERS ‑- FUNDS ‑- FEDERAL FOREST RESERVE ‑- DISTRIBUTION ‑- JOINT SCHOOL DISTRICT ‑- CONSTRUCTION OF FACILITIES The board of county commissioners of a county in which part of a joint school district is located may not expend federal forest funds for improvement or addition to school buildings situated in another county, where the joint district belongs to such other county under RCW 28.57.250.