703.1 The following considerations apply when determining whether a property meets the definition of a non-contributing building, structure, or site:

1. (a) A building or structure does not add to a district's sense of time and place and historical development if its qualities of location, design, setting, materials, workmanship, feeling and association have been so altered or are so deteriorated that the integrity of the property is irretrievably lost.
2. (b) A building or structure does not share the historic associations or historic architectural qualities for which a district is significant if it does not date from the district's period of significance, does not relate to its documented significance, or no longer possesses historic integrity due to changes since the period of the significance.
3. (c) An archaeological site does not contribute to the archaeological values for which a district is significant if it postdates the district's period of significance, does not relate to its documented significance, or is no longer capable of yielding important information about the period due to disturbance or other changes.

703.2 For districts with a specified period of significance, some buildings or structures may be judged to have achieved significance based on re-evaluation or the passage of time since the district's designation. For districts lacking a specified period of significance, non-contributing buildings shall be identified on a case-by-case basis.

703.3 Ordinarily, when considering eligibility for the National Register, buildings that date from the past 50 years do not contribute to the significance of a district unless a strong justification concerning their historical or architectural merit is given, or the documented historical attributes of the district are less than 50 years old.

703.4 The same criteria may be applied to historic landmarks.

SOURCE: Notice of Final Rulemaking published at 51 DCR 7447 (July 30, 2004).