400
DM1- Municipal Code Section 9.20.050. Exemption provisions for emergency work or government preempted activities.
SD1 - Municipal Code Section 59.5.0404; the Section also allows exception by permit of the Noise Abatement and Control
Administrator.
IB1 - Municipal Code Section 9.32.020H. Section 9.32.060 allows exemption by permit of the City Manager.