4. ISSUING A NOISE ABATEMENT NOTICE AND TESTING FOR COMPLIANCE

The CNL shall be compared with the ANL. When the CNL is greater than the ANL, the Authority may issue a Noise Abatement Notice (NAN). In cases where a NAN has already been issued the Authority shall compare the CNL, measured at a point as specified in the NAN, with such requirements as may be specified in the NAN to determine if the NAN is being complied with.