Board Members Can't Exclude the Opposition from Meetings
HOA boards cannot exclude or prohibit board members from executive sessions or other meetings. In McNally v. Sun Lakes Homeowners Association #1, Inc., 241 Ariz. 1, 382 P.3d 1216 (October 13, 2016), the Court of Appeals rejected an association's argument to exclude a board member from all executive sessions, holding that "bypassing the motion, the Board prevented [her] from performing her duties and responsibilities as a director."
The Court wrote:

A Big Victory for the Little Guy in HOA Law!
In Turtle Rock III Homeowners Association v. Fisher, 243 Ariz. 294, 406 P.3d 824 (October 26, 2017), Division One of the Arizona Court of Appeals held that homeowners associations are prohibited from imposing and collecting fines or penalties if the HOA did not have a valid, published written fine penalty policy. The absence of such a policy was per se unreasonable and, as such, the fines were unenforceable.
Second Mortgages and Lines of Credit
Arizona law prohibits a lender from filing a lawsuit to collect on a home loan where the loan represents “purchase money,” that is, money used to purchase the property. This includes purchase money loans that are technically denominated as “home equity lines of credit” taken out at the time of the original purchase of the home. It also includes first, second, and even third mortgages where the money was borrowed as part of the purchase of the property
What happens after the bankruptcy discharge: An emerging (and disturbing) trend in foreclosure, bankruptcy, and HOA law
The prevalence of foreclosures in the real estate market has had several unexpected repercussions to distressed homeowners who have made the decision to walk away from their home. Banks appear to be unable, incapable, or unwilling to handle the volume of foreclosures, so a distressed homeowner may continue to own his or her home for months, and occasionally even years, after receiving a Notice of Trustee’s Sale (rather than the 90-days stated in the Notice).
Can they really shut off my water?
Homeowner and condominium associations are increasingly adopting policies for shutting off water or other utilities where an owner has fallen behind in his or her assessments, owes fines or penalties for violating the governing documents, or is supposedly refusing to follow rules. Although people who own in a homeowner association generally are obligated to pay assessments, associations commonly use these water shut-off policies in order to force members to pay assessments, fines, penalties or other charges that they may not owe. These owners often face an unfair choice: Pay what we tell you to pay or live without water.
My HOA got a $1,200.00 judgment against me. So why are they saying I owe $6,000?
If you live in a homeowners association and have ever fallen behind on your assessments, chances are good you received one or more letters threatening legal action. If you have been unlucky enough to be sued by your homeowners' association and lost, chances are very good that your homeowner association has added court costs and attorneys’ fees to the amount of the unpaid assessments. Arizona law and homeowners association’s governing documents generally permit a homeowners association, if successful in court, to include its costs and attorneys’ fees in addition to the unpaid assessments in any judgment it obtains against you.
Your Almost-Absolute Right to Inspect Records
Arizona law is clear on the subject of your HOA's records -- as a member of the HOA, you have the right to inspect and copy any and all association records. Meeting minutes, financial records, bank statements, vendor's contracts, bills, invoices, checks, voting records...just about anything!