This report is submitted pursuant to Section 207 of the Commercial Spectrum Enhancement Act (CSEA), Title II of P.L. 108-494, which requires annual reporting on Federal agencies’ progress in vacating certain wireless communications systems from the 1710 megahertz (MHz) to 1755 MHz radio spectrum that has been reallocated to commercial use. The National Telecommunications and Information Administration (NTIA) published the first annual report to Congress in March 2008. That report covered relocation activity during the period from March 2007 through December 2007. The second annual report documented the cumulative progress from March 2007 through December 2008. This third annual report documents the cumulative progress since the commencement of relocation activity in March 2007 through December 2009.