You do not indicate where you are from which might make a big difference. Here, in TX, an HOA has quite a bit of power and is assumed to be correct if things go to court. The kicker is they have the power to intimidate and coerce HOA members through fines without even going to court. So fines can be levied and allowed to build before anything gets to a legal resolution. I suggest you read your covenants very closely along with any state statutes addressing HOA powers and authority and compare those with any official letters you have received.
OP here. yes, i'm in texas. and yes, she is threatening a fine (actually, threatening my landlord with a fine). as to the legality of storing cylinders, am i correct that a scuba cylinder is only HAZMAT when being filled/transported (thats why blending techs need to take HAZMAT refreshers every three years?) if so, how could this HOA superseded the law?
The following is not intended to constitute legal advice. Nobody is going to be able to give the OP a proper answer until the OP responds to the questions posed in the responses. How were the cylinders even visible? How and where were they stored? What state does the OP reside in? When the OP says that he was accused of violating the complex's deed restrictions, the OP needs to be much more specific. Which particular deed restriction(s) did the OP allegedly violate?
the cylinders were not visible. i keep them stored in an interior closet with 500-700 psi. she most likely witnessed my transporting them to/from the car. and, as stated above: i live in texas. apparantly - from reading your responses - this means the HOA could call in an airstrike if they felt the need.