In Arizona, your ESA housing rights rest first on state law. The Arizona Fair Housing Act (A.R.S. § 41-1491 et seq.) prohibits housing discrimination based on disability, and under A.R.S. § 41-1491.19 a refusal to make reasonable accommodations, including for an assistance animal that provides emotional support, is unlawful discrimination. This state protection is enforced by the Arizona Attorney General's Civil Rights Division and remains fully active. The federal Fair Housing Act (42 U.S.C. § 3604) provides the same obligation, and that statute has not changed.
Landlords in Cottonwood who refuse a valid ESA letter or continue charging pet fees may be in violation of the Arizona Fair Housing Act (A.R.S. § 41-1491) and federal law. Complaints can be filed with the Arizona Attorney General's Civil Rights Division.