Public Contract Code § 20486
ARTICLE 29. Public Entities—Municipal Improvement Act of 1913
If the owners fail to elect to take the work and to enter into a written contract therefor within 10 days, or to commence the work within 15 days after the date of the written contract, and to prosecute the same with diligence to completion, a contract shall be entered into with the original bidder to whom the contract was awarded at the prices specified in his bid.