A wireless terminal device (30) is capable of operating both in a licensed radio frequency band and an unlicensed radio frequency band. The wireless terminal device (30) comprises processor circuitry (40) configured (1) to select a first requirement comprising at least a first rule governing utilization of the unlicensed radio frequency band and (2) to use a second requirement comprising at least a second rule for implementing the first rule of the selected first requirement. The first requirement may be a regional requirement and the second requirement may be an operator requirement.