After years of evidence-gathering in the lawsuit against the Post Office regulation against petitioning on interior post office sidewalks, the final briefs are about to be filed. The first round is due April 15, the second round on April 30, and the final round on May 15. The case is called Initiative & Referendum Institute v U.S. Postal Service, and is pending in U.S. District Court in the District of Columbia. The case was filed in 2000.