Robb,
FL 489.103 7 is that you are serving as your own contractor, is this correct?
I'm also reading that you submitted your plans for approval by the Association and they initially approved the plans and then pulled that approval. Do you have any of that in writing or is this just verbal?
What do your governing documents specify about new construction (and in what document)?
Typically, an Association may have stricter rules than State, County or City. This is how the State/County/City might approve a building permit for a shed but if the Association has a covenant that says no sheds, then the shed can not be built. I asked what the governing documents specify and in what document it is specified as this most likely be the determining factor.
A Board may not grant a waiver to any covenant, condition or restriction identified in the CCC&Rs (deed restrictions). They might be able to grant waivers to bylaws or resolutions but it will depend on the language used.
If a Board has granted a waiver in the past, and had the authority to do so, they should be granting waivers under the same terms - otherwise it is considered selective enforcement. However, to contest anything about selective enforcement you will most likely need to go through the courts. If you are thinking about this avenue, I would suggest you obtain copies of the waivers for the other properties you posted about and then take those copies, your governing documents and your documentation about this requested waiver to an attorney for review and advice.
If a Board has granted a waiver in the past, and did not have the authority to do so, then they may not grant a waiver to you and it would
not be considered selective enforcement.
Hope this helps.