Now HART has a particular arrangement with the Federal Transit Administration ( "Full Funding Grant Agreement") and changing from rail to bus requires a major amendment to the FFGA which must be reviewed by the FTA and its cost contractor (which in this case is Jenkins Engineering) before any changes can be carried out and those changes must be reported to Congressional appropriations committees. The FTA wants make sure the agency receiving the funds is able to carry out the project before approving the change.