In response to mounting research, U.S. Rep. Lloyd Doggett (D–Texas) introduced the Coal Tar Sealants Reduction Act of 2012 (H.R. 4166), along with four co-sponsors. The legislation specifies that, after enactment, manufacturing of coal tar sealants would phase out during the course of 1 year, distribution would stop after 1.5 years, and all sales would cease within 2.5 years. Find more information about coal-tar sealants in this U.S. Geological Survey fact sheet or this public information piece by the University of New Hampshire Stormwater Center.