The Buenos Aires Metro had been subsidized as well; instead of removing these subsidies directly as was done with other services, however, the National Government proposed the subways' transfer to the City of Buenos Aires. Mayor Mauricio Macri initially accepted, but further differences arose. The National Government intended to transfer the subways without the subsidized budget needed to operate them, and the city had already passed a municipal budget for 2012 which did not consider these added costs. The 2012 Buenos Aires rail disaster generated concern about the conditions of railways and subways, moreover. The city administration considered that without the transfer of subsidies the city's economy would be harmed, and that the administration's conditions regarding these were an imposition. The National Government sent a bill to Congress to approve the transfer, and Macri did similarly with the City Legislature; both must approve the transfer to confirm it.