; relating to regulatory planning and review); and (G) collaborate with the NTIA on spectrum planning. (d) Coordination between federal agencies and the NTIA (1) Updates Not later than 3 years after the date of enactment of this section, and every 4 years thereafter (or more frequently, as appropriate), the Commission and the NTIA shall reassess the Memorandum and, based on such a reassessment, update the Memorandum, as necessary. (2) Nature of update Any update to the Memorandum under paragraph (1) shall reflect changing technological, procedural, and policy circumstances, as determined necessary and appropriate by the Commission and the NTIA. (e) Annual report to Congress Not later than 1 year after the date of enactment of this section, and annually thereafter, the Chair and the Under Secretary shall submit to Congress a report on joint spectrum planning activities conducted by the Chair and the Under Secretary under this section. (f) Testing A Federal entity shall coordinate and reach agreement with the NTIA before carrying out any electromagnetic compatibility study or testing plan that the Federal entity seeks to be considered in formulating the views of the executive branch regarding spectrum regulatory matters. (g) Report on spectrum management principles and methods Not later than May 14, 2025, the Under Secretary, in coordination with the Spectrum Advisory Council, shall publish a report that identifies— (1) spectrum management principles and methods to guide the Federal Government in spectrum studies and science; (2) coordination guidelines for spectrum studies