No road supervisor shall use or contract the use of any motor truck or road building equipment owned by the road supervisor or any relative within the third degree of consanguinity or affinity in the construction or maintenance of any county road or highway, except in cases of emergency, when it shall be lawful for the road supervisor to use or contract the use of such truck or equipment for a period of not to exceed 5 days in any 1 month.
NRS 404.110