The permission granted under section 122 shall become void in the

following cases, namely:-

1. (a) if the advertisement contravenes any bye-law made under this Act;
2. (b) if any material change is made in the advertisement or any part

thereof without the previous permission of the Commissioner;

1. (c) if the advertisement or any part thereof falls otherwise than through accident;
2. (d) if any addition or alteration is made to, or in the building, walls,

1. (e) if the building, wall, boarding, frame, post or structure over which