; (B) at least 3 shall have education or experience in energy and minerals development, reclamation, or remediation; and (C) up to 3 shall be appointed as at-large members. (3) Ex officio member The Director of the Bureau of Land Management, or a designee of the Director of the Bureau of Land Management, shall be an ex officio nonvoting member of the Board. (b) Appointment and terms (1) Initial appointment Not later than 1 year after the date of the enactment of this Act, the Secretary shall appoint the members of the Board in accordance with paragraph (6) who, except as otherwise provided in paragraph (2), shall be appointed for terms of 6 years. (2) Staggered appointments In appointing the initial members of the Board, the Secretary shall appoint, as determined to be appropriate by the Secretary— (A) one-third of the members to serve an initial term of 2 years; (B) one-third of the members to serve an initial term of 4 years; and (C) one-third of the members to serve an initial term of 6 years. (3) Vacancy A vacancy on the Board shall be— (A) filled not later than 60 days after the vacancy occurs, in the manner of which the original appointment was made