I’ll agree with excathedra, in the main. Letting people know that permission has been sought and granted is a good idea but I wonder if it might become cumbersome. Perhaps a permit display system would be needed if this was a regular occurrence.
On a general note, the OC or EC can do what they want with common property provided they pass the appropriate by-laws and they aren’t in conflict with superior laws. For instance, a common property visitors parking spot can’t be sold or let to an owner if its establishment was part of the Development Approval.