. . . " in the applicable publication entitled Definitions of Covered Occupations for Public Works Contracts in Oregon. (b) If a public works project is subject to both ORS 279C.800 to ORS 279C.870 and to the Davis-Bacon Act (40 U.S.C. 3141 et seq.), every public works contract and subcontract must provide that the worker whom the contractor, subcontractor or other person who is a party to the contract u" . .