Nothing contained in this article or in the designation of property as being in an
historic district or being an historic landmark shall affect the present legal use
of property. Use classifications as to all property which may be included in an historic
district or historic landmark shall continue to be governed by the general zoning
provisions of this chapter and the procedures therein established. In no case, however,
shall any use be permitted which requires the demolition, razing, remodeling, or alteration
of any buildings or structures in such an historic district or historic landmark so
as to adversely affect the character of the district or historic landmark, except
upon compliance with the terms of this article.