SEC. 3. RIGHT TO DISPLAY THE FLAG OF THE UNITED STATES. A condominium association, cooperative association, or residential real estate management association may not adopt or enforce any policy, or enter into any agreement, that would restrict or prevent a member of the association from displaying the flag of the United States on residential property within the association with respect to which such member has a separate ownership interest or a right to exclusive possession or use.
I don't think the law's provisions supercedes an HOA agreement with tenants and owners. But, if I am wrong, you can point out the provision that clearly permits here to fly the flag.