You might not have this intention but a subsequent purchaser may think differently.
Adding a second kitchen usually denotes an intention to create an additional dwelling. I don’t believe council will approve of this addition … even the addition of a ‘wet bar’ raises red flags with many councils.
I don’t believe that a grant of exclusive use would allow for this to occur. You do not own this space. The OC owns this space.
My thoughts are that if you undertake an activity that may be in breach of the Act or any other Act then you risk having your grant of exclusive use revoked.