The Council shall meet not less often than annually to review the sexual assault risk-reduction and response training developed under section 2507a of this title, the sexual assault policy developed and implemented under section 2507b of this title, and such other matters related to sexual assault the Council views as appropriate, to ensure that such training and policy conform to the extent practicable to best practices in the sexual assault field. To carry out this subsection, the Council may conduct case reviews and is authorized to have access, including through interviews, to current and former volunteers (to the extent that such volunteers provide the Peace Corps express consent to be interviewed by the Council), to volunteer surveys under section 2507e of this title, to all data collected from restricted reporting, and to any other information necessary to conduct case reviews, except that the Council may not have access to any personally identifying information associated with such surveys, data, or information.