; (4) consider the concentration of UFPs resulting from various aviation fuel sources including aviation gasoline, sustainable aviation fuel, and hydrogen, to the extent practicable; (5) identify measures intended to reduce the release of UFPs; and (6) identify information gaps related to understanding potential relationships between UFP exposures and health effects, contributions of aviation-related emissions to UFP exposures, and the effectiveness of mitigation measures. (c) Coordination The Administrator may coordinate with the heads of such other agencies that the Administrator considers appropriate to provide data and other assistance necessary for the study. (d) Report Not later than 180 days after the National Research Council submits of the results of the study to the Administrator, the Administrator shall submit to the appropriate committees of Congress a report containing the results of the study carried out under subsection (a), including any recommendations based on such study. (e) Definition of ultrafine particle In this section, the terms ultrafine particle and UFP mean particles with diameters less than or equal to 100 nanometers. 792. Aircraft Noise Advisory Committee (a) Establishment Not later than 180 days after the date of enactment of this Act, the Administrator shall establish an Aircraft Noise Advisory Committee (in this section referred to as the Advisory Committee ) to advise the Administrator on issues facing the aviation community that are related to aircraft noise exposure and existing FAA noise policies and regulations. (b) Membership The Administrator shall appoint the members of the Advisory Committee, which shall be comprised of— (1) at least 1 representative of each of— (A) engine manufacturers; (B) air carriers; (C) airport owners or operators; (D) aircraft manufacturers; (E) advanced air mobility manufacturers or operators; and (F) institutions of higher education