Federal regulations have changed the application process for each Commercial Driver License (CDL) holder who is applying for an initial hazardous materials (HAZMAT) endorsement or renewing a CDL with a HAZMAT endorsement. The new federal regulations took effect on January 31, 2005 and require all CDL holders who are applying for their initial HAZMAT endorsement to provide proof of US citizenship or proof of appropriate immigration status, complete a Federal security threat assessment application, pay additional Federal fees, have their fingerprints taken and successfully complete a Federal criminal history background check. For drivers renewing their CDL with HAZMAT endorsement or transferring into Pennsylvania from another state, these new requirements will take place on May 31, 2005. The process must be completed each time a CDL with hazardous materials endorsement is issued or renewed. Additional information and Hazardous Materials Endorsement Application(s) can be downloaded from the Pennsylvania Conference of Teamsters website at: