In 2006, the Federal Aviation Administration (FAA) commenced a rule making proceeding to amend its notification procedures for tower construction and modification. Specifically, the FAA is proposing to add notification requirements and obstruction standards for electromagnetic interference (EMI) and proposes to require proponents to file with the agency a notice of proposed construction or alteration of structures near airports. This could include projects as small as adding equipment to an existing tower. The proposal would also increase the number of days in which a notice must be filed with the FAA before beginning construction or alteration. The scope of the FAA's proposed rule changes is somewhat vague, but it could potentially require parties to notify the FAA anytime changes are made to any tower. Comments in this proceeding were due by September 11, 2006, and it is our understanding that this docket is receiving increased attention by officials recently appointed to the FAA.