ith a BS to UE minimum coupling loss of 53 dB; and local area base stations are characterized by requirements derived from pico-cell scenarios with a BS to minimum coupling loss of 45 dB [5]. The local area and medium range BS classes have different requirements compared to wide area base stations, mainly due to shorter minimum BS to device distance and lower mini- mum coupling loss. The maximum BS output power is limited to 38 dBm for medium range base stations and 24 dBm for local area base stations. This power is defined per antenna and per carrier. There is no maximum BS output power defined for wide area base stations. The spectrum mask, that is, the limits on the operating band unwanted emissions (OBUE), has lower limits for medium range and local area, consistent with the lower maximum out- put power levels. The receiver reference sensitivity limits are higher and more relaxed for the medium range and local area base stations. The receiver dynamic range and in-channel selectivity (ICS) are also adjusted accordingly for these BS classes. The limits on co- location for medium range and local area base stations are relatively more relaxed compared to the wide area base stations. The co-location refers to the additional blocking requirement which may be applied for the protection of NR BS receivers when another GSM, CDMA, UTRA, E-UTRA, or NR BS operating in a different frequency band is co-located with an NR BS. The requirement is applicable to all channel bandwidths supported by the NR BS. These requirements assume a 30 dB coupling loss between interfering transmitter and NR BS receiver and are based on co-location with base stations of the same class. All medium range and local area BS limits for receiver susceptibility to the interfering signals are adjusted considering the higher receiver sensitivity limit and the lower minimum coupling loss (BS to device) [5]. The requirements for base stations that are capable of multi-band operation are defined at the multi-band connector or multi-band RIB, where the RF