All three must consent before securing any permits since they have the power to revoke permits. They prohibit any business from setting up in the area. Moreover, it is highly discouraged for anyone to buy a house within the heritage zone since one does not have a right to alter the property.
To obtain permits, all three parties must agree, as they hold the power to revoke them. The area is prohibited from hosting any new businesses. It's also strongly discouraged for anyone to buy a house within the heritage zone because altering the property is not permitted.