Before entering upon the performance of his duties the county engineer shall execute and deliver to the board of county commissioners a bond in such sum as may be fixed by the board of county commissioners with sufficient surety to be approved by the board, conditioned upon the faithful performance of his duties as such engineer, and that he will account for and deliver to his successor in office, at the expiration of his term, all books, papers and other property belonging to the county.
Okla. Stat. tit. 69, § 625