Key legal question
Whether a pre-1974 building may rely on the mailbox exception without already having a mailbox with a shelf at the existing location.
Extracted holding
The exception applies only if the existing mailbox already meets the shelf requirement; it cannot be retrofitted later to avoid relocation.
Extracted reasoning
The court upheld the lower court's interpretation of Arts. 11, 15 and 16 Vo UVEK as consistent with the purpose of ensuring rapid and broad implementation of efficient postal delivery and allowing exceptions only narrowly.