expenses, including per diem in lieu of subsistence, in accordance with applicable provisions of subchapter I of chapter 57 of title 5, United States Code. (e) Staff On request of the Council and on a reimbursable basis, for the purpose of assisting the Council in carrying out the duties of the Council, the Secretary, the Secretary of Education, and the Secretary of Health and Human Services may each detail to the Council any personnel of their respective departments. (f) Frequency of meetings (1) In general The Council shall meet at least every 3 months. (2) Discretion of the Secretary The Secretary may require the Council to sit for additional meetings at the discretion of the Secretary. (3) Discretion of the Chair The Chair may require the Council to sit for additional meetings at the discretion of the Chair or on written request of 1/3 of the members. (4) Notice to members The Chair shall give each member of the Council notice of a meeting no fewer than 15 days before the meeting. (g) Charter