Thank you for continuing to pass on this petition to find more supporters. Frederick Reimers' reporting in Outside Magazine (here) lays out an in-depth synopsis of the commercial overflight situation in National Parks. 

Public support for a Quiet! Glacier is needed for Glacier National Park to complete the Air Tour Management Plan per the GNP General Management Plan.  On Air Tours, it reads in part (p40): "The National Park Service will request that the Federal Aviation Administration (FAA) prohibit commercial sightseeing tours of the Park."