1. Short title This Act may be cited as the WMATA Flexible Funding and Safety Improvement Act . I Operating Assistance 101. Federal operating assistance Section 5307 of title 49, United States Code, is amended by adding at the end the following: (i) Special rule The Secretary may make grants under this section to finance the operating cost of equipment and facilities for use in an urbanized area with a population of not fewer than 200,000 individuals, as determined by the Bureau of the Census, for a public transportation system that— (1) operates as an interstate compact agency by the terms of its enabling legislation; and (2) is an agency and instrumentality of 3 signatories, which have enacted legislation— (A) to provide a dedicated source of revenue to finance the operating costs of equipment and facilities for use in public transportation