The county commissioners in all counties may not later than November 1, 1968, and as necessary thereafter, designate which appointive officers or employees of said county shall be required to give surety to the state of Kansas and said county, having due regard for the duties and responsibilities of any such office or employment and the county commissioners shall require such surety in such amount or amounts and upon such terms and conditions as to the county commissioners shall seem necessary and proper. Any such appointive officer or employee shall be deemed to have furnished surety if he is covered by a blanket bond.