; (B) the Secretary determines, after consultation with the airport sponsor or State, as applicable, that the placement of automated weather-observing equipment at the airport will not cause unacceptable radio frequency congestion; and (C) the other requirements under that chapter are met. (2) Applicability to low population density States This subsection is applicable only to airports located in states with a population density, based on the most recent decennial census, of 50 or fewer persons per square mile. (e) Report Not later than September 30, 2025, the Administrator shall submit to the appropriate committees of Congress a report on the implementation of the requirements under this section. 554. Prioritizing and supporting the Human Intervention Motivation Study (HIMS) program and the Flight Attendant Drug and Alcohol Program (FADAP) (a) In general The Administration shall continue to prioritize and support the Human Intervention Motivation Study (HIMS) program for flight crewmembers and the Flight Attendant Drug and Alcohol Program (FADAP) for flight attendants. (b) Study and recommendations (1) In general The Secretary of Transportation shall enter into an agreement with the Transportation Research Board (in this subsection referred to as the Board ) under which the Board shall— (A) conduct a study on the Human Intervention Motivation Study (HIMS) program, the Flight Attendant Drug and Alcohol Program (FADAP), and any other drug and alcohol programs within the other modal administrations within the Department of Transportation; (B) to the extent justified by the findings from the study described in subparagraph (A), make recommendations to the Federal Aviation Administration and other administrations within the Department of Transportation on how to implement programs, or changes to existing programs, that seek to help transportation workers get treatment for drug and alcohol abuse and return to work