to neighborhoods. Medium voltage lines may be overhead or underground, depending on the power grid network topology. (g) Access BPL Database. A database operated by an industry-sponsored entity, recognized by the Federal Communications Commission and the National Telecommunications and Information Administration (NTIA), containing information regarding existing and planned Access BPL systems, as required in Section 15.615(a) of this subpart. Section 15.605 Cross reference. (a) The provisions of subparts A and B of this part apply to Access BPL devices, except where specifically noted. The provisions of subparts C-F of this part do not apply to Access BPL devices except where specifically noted. (b) The requirements of this subpart apply only to the radio circuitry that is used to provide carrier current