; (2) address strengths and weaknesses of such equipment, standards, and systems, including with respect to costs; (3) outline potential regulatory and procedural changes that may need to be undertaken by the FAA and other government entities, as well as equipment, standards, and systems that may need to be developed and required, to enable the development and voluntary use of equipment (existing or new) that enables the use of portable, and installed, low cost position reporting in airspace not mandated for ADS-B Out; (4) determine market size, development costs, and barriers that may need to be overcome for the development of technology that enables the use of portable, and installed, low cost position reporting in airspace not mandated for ADS-B Out