To me, the key phrase here is “…store or accumulate in public view…”. If your stuff was hidden away in a “Box Thing”, would it be in public view. It looks to me as if the by-law was written to stop people leaving assorted jumble in their car spaces (which is fair enough).
In our block, you are allowed to have a Box Thing in your car space but it must be of a design and colour approved by the committee. So maybe that’s your approach – ask the committee what kind of container would be approved that would give people storage without offending the eye of the beholder.
And if they say NONE, start a little campaign in your block to have a storage module approved. The lack of storage is the bane of apartment dwellers lives – you might fnd you have a lot of support at your next AGM.