; (2) describing any planned near-term ILS installations; and (3) outlining the approach of the FAA to accelerate future procurement and installation of ILS throughout the national airspace system in a manner consistent with the requirements of title VIII of division J of the Infrastructure Investment and Jobs Act ( Public Law 117–58 ). 602. Navigation aids study (a) In general Not later than 180 days after the date of enactment of this Act, the inspector general of the Department of Transportation shall initiate a study examining the effects of reclassifying navigation aids to Design Assurance Level–A from Design Assurance Level–B, including the following navigation aids: (1) Distance measuring equipment. (2) Very high frequency omni-directional range. (3) Tactical air navigation. (4) Wide area augmentation system. (b) Contents In conducting the study required under subsection (a), the inspector general shall address— (1) the cost-benefit analyses associated with the reclassification described in such subsection; (2) the findings from the operational safety assessments and preliminary hazard analyses of the navigation aids listed in such subsection; (3) the risks of such reclassification on navigation aid equipment currently in use; (4) the potential impacts on global interoperability of navigational aids