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If the new plan says it is rustica again it is not matter that before you could do something there
You could try to make an apeal to the new situation but to be honest your chance is very short
The apeal starts with a writting made by an arquitect or another profesional who study the local rules, to star is not to expensive but once they declined and it is almost sure they will do, they will force you to go in court where you will have to spent money and your chance will keep being short
So, my advice is to wait for a new plan who change the actual situation. Another way will force you to spend money being not sure to win
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