36 CFR §1237.22

1. (a)Maintain permanent and unscheduled cartographic, architectural, and engineering records in an environment that does not exceed 70 degrees Fahrenheit and with relative humidity under 50%.
2. (b)Create an identification scheme for each series and assign unique identification designations to each item within a series.
3. (c)Maintain lists or indexes for each series with cross-references to related textual records.
4. (d)Avoid interfiling separate series of maps, charts, or drawings, and file permanent cartographic and architectural records separately from temporary series unless hand-corrected versions have been systematically filed with other published maps in a central or master file.
5. (e)Avoid rolling and folding maps and drawings. Store permanent maps and drawings flat in shallow drawer map cases in acid-free folders.
6. (f)Do not laminate original oversize records. Consult NARA for preservation, storage, and treatment options, by mail at National Archives and Records Administration; Preservation Programs (RX); 8601 Adelphi Road; College Park, MD 20740-6001.