E’ chiaro che una situazione del genere può rimanere invariata nel rispetto delle regole che vigevano alla data della sua costruzione, in caso che non si facciano interventi o che questi siano di piccola entità.
It is clear that such a situation may remain unchanged in accordance with the rules at the time of vigevano construction, in case that no interventions or that these are minor.
It 'clear that such a situation may remain unchanged in accordance with the rules that existed at the date of its construction, in the event that you do not work or that these remain minor.
It is clear that such a situation can remain the same in respect of the rules that existed at the date of its construction, in the event that you do not do interventions or that these are small.