KRS 212.460

All work done or supplies or materials purchased in carrying out the purpose of KRS 212.350 to 212.620, when involving an expenditure of one thousand dollars ($1,000) or more, shall be by contract awarded to the lowest and best bidder after advertisement by publication pursuant to KRS Chapter 424. All bids or parts of bids, for any such work or supplies, may be rejected by said board. The board, however, may itself do or cause to be done, any part or parts of its work under such conditions as it may prescribe by day labor when the director of health, in writing, shall recommend such action.