Every contract to which a public body of this
state is a party, requiring the employment of skilled mechanics,
skilled workmen, semiskilled mechanics, semiskilled workmen
or unskilled labor in the performance of public work, must contain
in express terms the hourly and daily rate of wages to be paid
each of the classes of mechanics and workmen. The hourly and
daily rate of wages must not be less than the rate of such wages
then prevailing in the county in which the public work is located,
which prevailing rate of wages must have been determined in
the manner provided in NRS 338.030