; and (B) provide, in writing, to the individual that filed the complaint and the air carrier or foreign air carrier alleged to have violated this section or a regulation prescribed under this section, the determination of the Secretary with respect to— (i) the facts underlying the complaint; and (ii) any action the Secretary is taking in response to the complaint. . C Air Service Development 751. Essential air service (a) Definitions Section 41731 of title 49, United States Code, is amended— (1) by striking subsection (a) and inserting the following: (a) Eligible place defined In this subchapter, the term eligible place means a place in the United States that— (1) is at least 75 miles from the nearest medium or large hub airport, if within the 48 contiguous states, which shall not be waived; (2) had an average of 10 enplanements per service day or more, as determined by the Secretary, during the most recent fiscal year; (3) during the most recent fiscal year had an average subsidy per passenger, as determined by the Secretary, of— (A) less than $500 for locations that are less than 175 driving miles from the nearest large or medium hub airport; and (B) less than $1,000 for all locations, regardless of driving distance to a hub; and (4) is a community that, at any time during the period between September 30, 2010, and September 30, 2011, inclusive— (A) received essential air service for which compensation was provided to an air carrier under this subchapter; or (B) received notice of intent to terminate essential air service and the Secretary required the air carrier to continue to provide such service to the community. ; (2) in subsection (b), by striking subsection (a)(1) of this section and inserting subsection (a) ; (3) in subsection (c), by striking Subparagraphs (B), (C), and (D) of subsection (a)(1) and inserting Paragraphs (2), (3), and (4) of subsection (a) ; (4) in subsection (d), by striking Subsection (a)(1)(B) and inserting Subsection (a)(2)