; and (5) any other practical implications of repealing the exception for airports or the national aviation system. (c) Report Not later than 18 months after the date of enactment of this Act, the Comptroller General shall submit to the appropriate committees of Congress a report on the results of the study. 144. GAO study on the effect of granting an exclusive right of aeronautical services to an airport sponsor (a) In general Not later than 2 years after the date of enactment of this Act, the Comptroller General of the United States shall conduct a study to examine the cases in which an airport sponsor has exercised an exclusive right (commonly known as a proprietary exclusive right), as described in the Federal Aviation Advisory Circular 150/1590–6 issued on January 4, 2007. (b) Report Upon completion of the study described under subsection (a), the Comptroller General shall submit to the appropriate committees of Congress a report on the findings of the study. 145. Sense of Congress on smart airports It is the sense of Congress that the Administrator of the Federal Aviation Administration and the Secretary of Transportation should produce a smart airports initiative plan that focuses on creating a more consumer-friendly and digitally connected airport experience. The plan should include recommendations on modernizing technologies to provide more efficient check-ins, shortened security lines, Wi-Fi and GPS upgrades, as well as improvements of aircraft turnaround for on-time boarding and flights. The purpose of the initiative is to invest in technologies and infrastructure toward better-connected airports while providing appropriate national security and cybersecurity for travelers. 146. Critical airfield markings Not later than 180 days after the date of enactment of this Act, the Administrator of the Federal Aviation Administration shall issue a request for proposal for a study that includes— (1) an independent, third-party study to assess the durability of Type III and Type I glass beads applied to critical