; and (2) complete the entire project in an expeditious manner. 749. Airport diagram terminology (a) In general The Administrator shall update Airport Diagram Order JO 7910.4 and any related advisory circulars, policy, and guidance to ensure the clear and consistent use of terms to delineate the types of parking available to general aviation pilots. (b) Collaboration In carrying out subsection (a), the Administrator shall collaborate with industry stakeholders, commercial service airports, and general aviation airports in— (1) facilitating basic standardization of general aviation parking terms; (2) accounting for the majority of uses of general aviation parking terms; and (3) providing clarity for chart users. (c) IAC specifications The Administrator shall encourage the Interagency Air Committee to incorporate the terms developed pursuant to subsection (a) in publications produced by the Committee. 750. GAO study on fee transparency by fixed based operators (a) In general The Comptroller General shall conduct a study reviewing the efforts of fixed based operators to meet their commitments to improve the online transparency of prices and fees for all aircraft and enhancing the customer experience for general and business aviation users. (b) Contents In conducting the study described in subsection (a), the Comptroller General, at a minimum, should evaluate the fixed based operator industry commitment to Know Before You Go best business practices including— (1) fixed based operators provisions for all general aviation and business aircraft types regarding a description of available services and a listing of applicable retail fuel prices, fees, and charges; (2) the accessibility of fees and charges described in paragraph (1) to aircraft operators on-line and in a user-friendly manner and with sufficient clarity that a pilot operating a particular aircraft type can determine what will be charged