- The Old Spanish National Historic Trail is subject to the administration, management, and other provisions of the National Trails System Act – https://www.law.cornell.edu/uscode/text/16/chapter-27 (courtesy of Legal Information Institute, Cornell Law School).
- The Old Spanish Trail Recognition Act of 2002 – https://www.govtrack.us/congress/bills/107/s1946/text .
- The National Park Service Feasibility Study for the Old Spanish National Historic Trail, as cited in above statutes, and affecting or governing the administration of the Trail – https://parkplanning.nps.gov/document.cfm?parkID=454&projectID=12591&documentID=38207
- The OSNHT Co-Administrators (BLM & NPS) “Old Spanish National Historic Trail – Final Comprehensive Administrative Strategy (released December, 2017) – https://parkplanning.nps.gov/document.cfm?documentID=83540
- Co-Administrator (BLM & NPS) realignments to the OSNHT accompanying the Final Comprehensive Administrative Strategy – https://www.arcgis.com/home/webmap/viewer.html?url=https://services1.arcgis.com/fBc8EJBxQRMcHlei/ArcGIS/rest/services/OLSP_CAS_Line_201801/FeatureServer/0&source=sd
- Comparison of Co-Administrator (BLM & NPS) Old Spanish National Historic Trail Feasibility Study alignments (2002 – 2017) with new Comprehensive Administrative Strategy realignments (December, 2017 – present) – https://arcg.is/1GnHiT
