There are many lawyers who’ve posted in this thread, some have self identified. It is wise to remember that free legal advice is worth what you pay for it & anyone concerned should consult counsel.
If an in house Disney lawyer assigned to the DVC legal team posted their opinion on the legal issues involved & then a lawyer representing a class of owners suing about the new rules posted their opinion - they’d both know their stuff & have convincing arguments for why they are right, but we wouldn’t know which side was right until a Judge (jury doesn’t apply here since there’s an express waiver of jury clause,) decided. That’s the nature of the beast

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FL statute 718.110(13) does not seem to prohibit condo associations from limiting renting when the condo is created, rather, it protects an owner from a Board enacting an ex post facto rental limitation & retroactively applying it to an existing owner who had no such restriction before.
I believe that DVC has always had restrictions on commercial renting, I know they have since 2013, because my VGF doc.s tell me so & regarding enforcement they state that the Board “may in its sole and absolute discretion, adopt policies to provide what constitutes a commercial enterprise, practice or purpose” At that time my doc.s said the Board had adopted a policy & that I could see it on request. My take on the recent events is that I no longer need to request to see the policy

. The new definition seems reasonable to me, but I use my points for my stays & to treat close family, so really have no dog in the fight.
Practically speaking, until DVCM takes steps to enforce the new policies which I assume were adopted by the Board & starts shutting down commercial renters, I’ll reserve judgement on whether their actions are reasonable or not. Moreover, unless I know the reservation/use history of anyone impacted, it’ll be hard to judge whether the rules were correctly applied or ‘fair.’ And unless the impacted renters decide to sue, we won’t know whether Disney’s interpretation of their doc.s, Florida statutes & Florida case law will w/stand scrutiny or the plaintiffs will meet their burden of proof & prevail.