Law360, New York ( April 18, 2016, 10:51 AM EDT) -- Under New York City's Landmarks Law (Title 25, Chapter 3 of the New York City Administrative Code), the New York City Landmarks Preservation Commission may designate the exterior and the interior of buildings as landmarks. There are two requirements for designating a building's exterior: (1) the building must be at least 30 years old and (2) it must have "a special historical or aesthetic interest or value as part of the development, heritage or cultural characteristics of the city, state or nation." Designation of an interior space as a landmark adds a third requirement: the interior space must be one that is "customarily open or accessible to the public, or to which the public is customarily invited."...