131. Sixty days after the date of the notice of motion and after obtaining the opinion of the local heritage council, the council of the municipality may adopt the by-law recognizing property as heritage property.
The heritage recognition by-law must provide the description of the property involved and state the reasons for recognition. If the notice of motion concerning a heritage immovable contains no particulars on the interior of the heritage immovable, only the exterior appearance of the immovable is covered by the motion, except in the case described in paragraph 3 of section 138.
A notice of motion is without effect at the expiry of 120 days after the date of the notice of motion if the council of the municipality has not adopted the by-law and brought it into force by then.