Except as provided in subsection (b) of this section, the Board may not issue a license for an establishment that is within 200 feet of a place of worship, school, public library, or youth center. The distance is to be measured from the nearest point of the establishment to the nearest point of the property line of the place of worship, public library, school, or youth center. The prohibition against issuing a license in subsection (a) of this section does not apply to: a licensed establishment that existed before the place of worship, school, public library, or youth center was built within 200 feet of the licensed establishment; an establishment having any previous owner who was the holder of a license to sell alcoholic beverages; and a temporary license.