Section 207 of the Commercial Spectrum Enhancement Act (CSEA), Title II of P.L. 108-494 requires annual reporting on federal agencies’ progress to vacate certain wireless communications systems from the 1710 megahertz (MHz) to 1755 MHz radio spectrum that has been reallocated to commercial use. 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. Each subsequent annual report documents the cumulative progress through December. This annual report documents the cumulative progress since the commencement of relocation activity in March 2007 through December 2011.