AZ property statutes are available at:
http://www.azleg.gov/ArizonaRevisedStatutes.asp?Title=33 I believe what you are looking for is in
33-1817 (applicable to planned communities - I did not check condominiums) [emphasis added]:
33-1817. Declaration amendment; design, architectural committees; review
Notwithstanding any provision in the community documents:
1.
Membership on a design review committee,
an architectural committee or a committee that performs similar functions, however denominated, for the planned community
shall include at least one member of the board of directors who shall serve as chairperson of the committee.