; and (C) work closely with the representative of the applicable Federal entity to the Interdepartmental Radio Advisory Committee. (4) Public contact (A) In general The head of each Federal entity described in paragraph (2) shall list, on the website of the Federal entity, the name and contact information of the representative of the Federal entity to the ISAC, as appointed under such paragraph. (B) NTIA responsibility The Under Secretary shall publish on the public website of the NTIA a complete list of the representatives to the ISAC appointed under paragraph (2). (5) Annual report In the last quarter of each calendar year, each executive agency that is authorized and directed to cooperate with the NTIA under section 105(c)(2) shall submit to the Under Secretary a report, for the fiscal year ending most recently before the beginning of such quarter, describing the steps taken in such fiscal year by the executive agency to comply with such section. (c) Coordination between Commission and NTIA (1) Updates Not later than 3 years after the date of the enactment of this section, and every 4 years thereafter or more frequently as appropriate, the Commission and the NTIA shall update the Memorandum. (2) Nature of update The updates required by paragraph (1) shall reflect such changing technological, procedural, and policy circumstances as the Commission and the NTIA determine necessary and appropriate. (d) Definitions In this section: (1) ISAC The term ISAC means the interagency advisory body that, as of the date of the enactment of this section, is known as the Interagency Spectrum Advisory Council. (2) Memorandum The term Memorandum means the Memorandum of Understanding between the Commission and the NTIA (relating to increased coordination between Federal spectrum management agencies to promote the efficient use of the radio spectrum in the public interest), signed on August 1, 2022, or any successor memorandum. (3) Spectrum action The term spectrum action means a proposed action by the Commission to reallocate