FCC Part 15 Rules:
The rules for operation in the UPCS band can be found in FCC Part 15 rules Subpart D - Unlicensed Personal Communications Service Devices, Section 15.301

Sixth Report and Order, Third Memorandum Opinion and Order and Fifth Memorandum Opinion and Order:
With the adoption of new rules for operation in the UPCS band, the FCC modified some of the operating parameters of the band to allow standards such as DECT, to utilize the band, however, the documentation and the rules are not always in synch. The following link provides the FCC's ruling on providing additional flexibility in the 1920-1930 MHz UPCS band. The specifics can be found in section IV. - Sixth Report and Order; part D; sub-parts 77 - 81.

Test Labs:
The FCC also has a search capability that will allow you to search for a test lab qualified to perform appropriate FCC testing for your product.