Mayor Vince Gray plans to introduce legislation tomorrow that would make it possible for all District residents to obtain driver’s licenses, including undocumented immigrants. Gray’s office announced the proposal yesterday evening on a Facebook page.

According to the mayor’s office, the bill would permit D.C. residents to get a driver’s license or identification card regardless of immigration status. Gray plans to unveil the legislation tomorrow at a press conference, where he will be joined by members of the D.C. Council.

Currently, four states—Illinois, Maryland, New Mexico, and Washington—offer driver’s licenses to undocumented immigrants. Maryland approved such a measure earlier this year. Oregon Gov. John Kitzhaber said today he will pursue the issue, while Colorado legislators recently approved a bill that would extend driver’s licenses and identification cards to undocumented immigrants.

But unlike those states’ laws and planned laws, Gray’s bill in D.C. would need to go through congressional review. The Senate is currently preparing comprehensive legislation, in the first major attempt in several years to reform federal immigration law.