; or engage in community development activities in areas with high rates of abandoned or distressed properties. Surface transportation board Salaries and expenses For necessary expenses of the Surface Transportation Board, including services authorized by section 3109 of title 5, United States Code, $37,500,000: Provided , That, notwithstanding any other provision of law, not to exceed $1,250,000 from fees established by the Surface Transportation Board shall be credited to this appropriation as offsetting collections and used for necessary and authorized expenses under this heading: Provided further , That the amounts made available under this heading from the general fund shall be reduced on a dollar-for-dollar basis as such offsetting collections are received during fiscal year 2021, to result in a final appropriation from the general fund estimated at not more than $36,250,000. United states interagency council on homelessness Operating expenses For necessary expenses (including payment of salaries, authorized travel, hire of passenger motor vehicles, and rental of conference rooms) of the United States Interagency Council on Homelessness in carrying out the functions pursuant to title II of the McKinney-Vento Homeless Assistance Act ( 42 U.S.C. 11311 et. seq.), as amended, $3,800,000, to remain available until September 30, 2022: Provided , That not more than $15,000 may be used for travel expenses by the Executive Director: Provided further , That the Executive Director may not engage in any official travel except for travel paid out of such amounts: Provided further , That no funds may be used to promote homelessness interventions unless those interventions include support for evidence-based interventions including the Housing First model and Permanent Supportive Housing. IV General provisions—this act 401. None of the funds in this Act shall be used for the planning or execution of any program to pay the expenses of, or otherwise compensate, non-Federal parties intervening in regulatory or adjudicatory