Systems and methods for managing priority exceptions for shared spectrum radio services are provided. In one embodiment, a shared spectrum radio services system comprises: a spectrum access system (SAS) configured to adjust transmit power levels of one or more radios, wherein the one or more radios transmit on a protected frequency of a shared spectrum, wherein the SAS is associated with a protection area that comprises at least one dynamic incumbent RF system that transmits on the protected frequency; and wherein the SAS applies a standard transmit expiration time parameter to the one or more radios, the standard transmit expiration time parameter indicating a time of day at which authorization to transmit on the protected frequency expires; and wherein the SAS is configured to execute a transmit expiration parameter exception protocol to override the standard transmit expiration time parameter for at least one of the one or more radios.