II 118th CONGRESS 1st Session S. 1958 IN THE SENATE OF THE UNITED STATES June 13, 2023 Ms. Duckworth (for herself, Mrs. Fischer , Ms. Ernst , Ms. Klobuchar , and Mr. Grassley ) introduced the following bill; which was read twice and referred to the Committee on Commerce, Science, and Transportation A BILL To identify the standards required to meet the definition of sustainable aviation fuel at the Federal Aviation Administration.