I'm not sure how to reference this properly, but FAA TERPS criteria as well as OCS criteria for ILS/ LPV's NDB's etc. etc. can be found in the FAA Flight Procedures Standards Orders
in this case order 8260.3B chapt. 9 [not sure if I referenced that in the correct format???]
http://www.faa.gov/about/office_org/...260.3_1-18.pdf