I see. Thank you very much for providing this additional information.
Under federal law, the housing association
must typically provide a reasonable accommodation to you where you have a disability, including permitting modifications of your property which may not otherwise be allowed under the association's rules.
However, the accommodation must be needed now, not just anticipated. But if you obtain documentation from your medical provider that you have a disability as defined by federal law and need the sliding glass door as a reasonable accommodation, then they should approve the modification typically.
If they do not, a complaint could be filed with the local HUD
offices or you could retain a local attorney to communicate a demand to the association or take legal action against them.
Here is a link which summarizes federal housing
laws with regard to disabilities and reasonable accommodations:
I hope this helps clarify the situation for you. Please remember to rate my service once you have all the information you need so I will be compensated for my time from the deposit you posted with this website. If you have any other questions, please ask me – I’ll be happy to respond. Thank you!