You mentioned two examples: (1) an existing fireworks stand that is allowed to operate at the same location although the sale of fireworks is otherwise prohibited; and (2) a sign that was erected in violation of a zoning ordinance but which has never been removed.
New hair will not grow back in the previously waxed area for four to six weeks, although some people will start to see regrowth in only a week due to some of their hair being on a different growth cycle.
Typically, hair loss begins two to four months after the event that triggered the problem, and lasts approximately six months. New hairs begin growing immediately after the hair falls out, but significant growth may not be noticed for several months.