Ariz. Rev. Stat. § 34-201
A. Except as provided in subsections B through G and L of this section, every agent, on acceptance and approval of the working drawings and specifications, shall publish a notice to contractors of intention to receive bids and contract for the proposed work. This notice shall be published by advertising in a newspaper of general circulation in the county in which the agent is located for two consecutive publications if it is a weekly newspaper or for two publications that are at least six but not more than ten days apart if it is a daily newspaper. The notice shall state:
3. That every proposal shall be accompanied by a certified check, cashier's check or surety bond for ten percent of the amount of the bid included in the proposal as a guarantee that the contractor will enter into a contract to perform the proposal in accordance with the plans and specifications. Notwithstanding any other statute, the surety bond shall be executed solely by a surety company or companies holding a certificate of authority to transact surety business in this state issued by the director of the department of insurance and financial institutions pursuant to title 20, chapter 2, article 1. The surety bond shall not be executed by an individual surety or sureties, even if the requirements of section 7-101 are satisfied. The certified check, cashier's check or surety bond shall be returned to the contractors whose proposals are not accepted, and to the successful contractor on the execution of a satisfactory bond and contract as provided in this article. The conditions and provisions of the surety bid bond regarding the surety's obligations shall follow the following form:
Now, therefore, if the obligee accepts the proposal of the principal and the principal enters into a contract with the obligee in accordance with the terms of the proposal and gives the bonds and certificates of insurance as specified in the standard specifications with good and sufficient surety for the faithful performance of the contract and for the prompt payment of labor and materials furnished in the prosecution of the contract, or in the event of the failure of the principal to enter into the contract and give the bonds and certificates of insurance, if the principal pays to the obligee the difference not to exceed the penalty of the bond between the amount specified in the proposal and such larger amount for which the obligee may in good faith contract with another party to perform the work covered by the proposal then this obligation is void. Otherwise it remains in full force and effect provided, however, that this bond is executed pursuant to the provisions of section 34-201, Arizona Revised Statutes, and all liabilities on this bond shall be determined in accordance with the provisions of the section to the extent as if it were copied at length herein.
C. Any building, structure, addition or alteration may be constructed either with or without the use of the agent's regularly employed personnel without advertising for bids, provided that the total cost of the work, excluding materials and equipment previously acquired by bid, does not exceed:
D. Notwithstanding subsection C of this section, any street, road, bridge, water or sewer work, other than a water or sewer treatment plant or building, may be constructed either with or without the use of the agent's regularly employed personnel without advertising for bids, provided that the total cost of the work does not exceed:
F. Notwithstanding this section, an agent may:
2. Construct recreational projects, including trails, playgrounds, ballparks and other similar facilities and excluding buildings, structures, building additions and alterations to buildings, structures and building additions, with volunteer workers or workers provided by a nonprofit organization without advertising for bids for labor and materials, provided that the total cost of the work does not exceed:
G. A contribution by an agent for the financing of public infrastructure made pursuant to a development agreement is exempt from this section if the contribution for any single development does not exceed: