47 C.F.R. § 1.9048
Special provisions relating to spectrum leasing arrangements involving licensees in the Public Safety Radio Services
Licensees in the Public Safety Radio Services (see part 90, subpart B, and § 90.311(a)(1)(i) of this chapter) may enter into spectrum leasing arrangements with other public safety entities eligible for such a license authorization as well as with entities providing communications in support of public safety operations (see § 90.523(b) of this chapter).