I would imagine that there are - or should be all sorts of ongoing checking of buildings with those spells to ensure they are not compromised - sort of like a strucutural engineering checks.


Bable Spoiler

It's a potentially interesting site plot - the guild of magical architects goes on a general strike causing something significant to collapse (ministry atrium) because it isn't maintained.

It would give the candidates something to debate over - how would they handle it?