N.M. Code R. § 4.10.4.9 – General Standards for Preservation, Protection, Rehabilitation or Restoration for Structures

A. Weather-related deterioration shall be prevented and measures to preserve the existing material shall be applied.
B. Deteriorated architectural features shall be repaired rather than replaced, wherever possible. In the event replacement is necessary, the new material shall match the material being replaced in composition, design, color, texture and other visual qualities. Repair or replacement of missing architectural features shall be based on accurate duplications of features, substantiated by historical, physical or pictorial evidence.
C. Missing elements shall be replaced in the exact form in which they appeared at the period of time represented, provided photographic or documented information is available, using like materials and methods or a substitute authorized by the state historic preservation officer.
D. Structural stability shall be maintained or re-established without essentially changing the existing form.
E. The surface cleaning of structures shall be undertaken only when necessary and then only with extreme caution. Sandblasting and other cleaning methods that will damage the historic building materials shall not be undertaken.
F. Every reasonable effort shall be made to provide a use for a property that requires minimal alteration of the building, structure or site and its environment or, if this is not feasible, to use a property for its originally intended purpose.
[3/26/87; 4.10.4.9 NMAC - Rn, 4 NMAC 10.4.9, 1/1/08]