ARIZ. REV. STAT. ANN. § 41-2631. Definitions
In this article, unless the context otherwise requires:
1. “Cooperative purchasing” means procurement conducted by, or on behalf of, more than one public procurement unit.
2. “External procurement activity” means any buying organization not located in this state that would qualify as a public procurement unit.
3. “Local public procurement unit” means any political subdivision, any agency, board, department or other instrumentality of such political subdivision and any nonprofit corporation created solely for the purpose of administering a cooperative purchase under this article.
4. “Nonprofit corporation” means any nonprofit corporation as designated by the internal revenue service under section501(c)(3) through 501(c)(6) or under section 115, if created by two or more local public procurement units, includes certified nonprofit agencies that serve individuals with disabilities as defined in section 41–2636.
5. “Public procurement unit” means a local public procurement unit, the department, any other state or an agency of the United States.
ARIZ. REV. STAT. ANN. § 41-2632
A. Any public procurement unit may either participate in, sponsor, conduct or administer a cooperative purchasing agreement for the procurement of any materials, services, professional services, construction or construction services with one or more public procurement units or external procurement activities in accordance with an agreement entered into between the participants. The cooperative purchasing may include joint or multi-party contracts between public procurement units and open-ended public procurement unit contracts that shall be available to local public procurement units. A nonprofit corporation may enter into an agreement pursuant to this section if one or more of the parties involved is a public procurement unit. …
F. Parties under a cooperative purchasing agreement may:
1. Sponsor, conduct or administer a cooperative agreement for the procurement or disposal of any materials, services or construction.
2. Cooperatively use materials or services.
3. Commonly use or share warehousing facilities, capital equipment and other facilities.
4. Provide personnel, except that the requesting public procurement unit shall pay the public procurement unit providing the personnel the direct and indirect cost of providing the personnel, in accordance with the agreement.
5. On request, make available to other public procurement units informational, technical or other services or software that may assist in improving the efficiency or economy of procurement. The public procurement unit furnishing the informational, technical or other services or software has the right to request reimbursement for the reasonable and necessary costs of providing these services or software.
ARIZ. REV. STAT. ANN. § 11-952
A. If authorized by their legislative or other governing bodies, two or more public agencies or public procurement units by direct contract or agreement may contract for services or jointly exercise any powers common to the contracting parties and may enter into agreements with one another for joint or cooperative action or may form a separate legal entity, including a nonprofit corporation, to contract for or perform some or all of the services specified in the contract or agreement or exercise those powers jointly held by the contracting parties.