No person shall place or cause to be placed in a highway any building or other material or grass, leaves or rubbish from adjoining premises or place or project into a highway any sign or encumbrance whatever, except merchandise for sale as permitted by Article
II of this chapter and except signs permitted in highways by § 240-10.3B(9) of Chapter
240 and by §
203-10 of this article, without the prior written permit, revocable at any time, of the Commissioner of Public Works.
No person shall place, project or allow any such material or
encumbrance to remain in a highway contrary to the terms or conditions
of such permit.