If the purchasing agency intends to enter into a contract for any public improvement that involves the expenditure of $100,000 or more, or a contract for the purchase of supplies or services, other than professional services, that involves the expenditure of $50,000 or more, the purchasing agency shall advertise for bids or proposals. The advertisement shall appear as a legal notice in the appointed legal newspaper. The advertisement shall be printed at least twice, with the first publication at least ten days before opening of bids or the deadline for the submission of proposals. The first publication shall be in each official newspaper of the purchasing agency, and the second publication may be in any legal newspaper of the state chosen by the purchasing agency. If the purchasing agency has no official newspaper, the first publication shall be made in a legal newspaper with general circulation in the jurisdiction of the purchasing agency to be selected by the purchasing agency. The advertisement shall state the time and place where the bids will be opened or the deadline for the submission of proposals. In each notice, the purchasing agency shall reserve the right to reject any or all bids or proposals.
(SDCL § 5-18A-14)