SDCL § 5-18A-15: Time for entering into contract.

After receiving notice of a contract award, the successful bidder or offeror shall enter into a contract with the purchasing agency within the time specified in the invitation for bids or request for proposals. If any bidder or offeror fails to enter into a contract within the time specified, the contract may be awarded to the next lowest responsive and responsible bidder or offeror for the same kind of work and material, unless all bids or proposals are rejected. The defaulting bidder or offeror shall be responsible for the difference in price.