10. The Minister may revoke a permit, after giving the holder an opportunity to be heard,
(1) where the advertising sign has not been displayed within the fixed time or where it has been removed or destroyed;
(2) where, in the case of advertising signs displayed back to back or anglewise to each other, that visible to a driver on his right-hand side has been removed or destroyed;
(3) where the advertising sign does not conform to this Act and the regulations or where the holder has not furnished proof of the authorizations required thereby.
The revocation has effect from the date of its sending, by registered or certified mail, to the permit holder.
Within 15 days after the revocation, the permit holder must remove the advertising sign which is on display, together with the display panel and the supporting structure, or replace it by a noncommercial sign which is in conformity with this Act and the regulations.