Sec. 174. UPDATING AIRPORT NOISE EXPOSURE MAPS

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## SEC. 174 UPDATING AIRPORT NOISE EXPOSURE MAPS Section 47503(b) of title 49, United States Code, is amended to read as follows: > > ### “(b) Revised Maps > > > #### “(1) In general > > An airport operator that submits a noise exposure map under subsection

(a)shall submit a revised map to the Secretary if, in an area surrounding an airport, a change in the operation of the airport would establish a substantial new noncompatible use, or would significantly reduce noise over existing noncompatible uses, that is not reflected in either the existing conditions map or forecast map currently on file with the Federal Aviation Administration. > > > #### “(2) Timing > > A submission under paragraph

(1)shall be required only if the relevant change in the operation of the airport occurs during— > > > ##### “(A) > > the forecast period of the applicable noise exposure map submitted by an airport operator under subsection (a); or > > > ##### “(B) > > the implementation period of the airport operator’s noise compatibility program.” > .