; (F) 1 member shall be appointed who has a background in past and present socioeconomic conditions of the Southwestern United States; (G) 1 member shall be appointed who has a background in cultural geography; and (H) 2 members shall be members of the governing body of a land grant-merced. (2) Terms Each member shall be appointed for the life of the Commission. (3) Vacancies A vacancy in the Commission shall be filled in the manner in which the original appointment was made. (4) Rate of pay To the extent or in the amounts provided in advance in appropriation Acts, Members shall each be entitled to receive daily compensation not to exceed the rate of basic pay for level V of the Executive Schedule for each day, including travel days, during which they are engaged in the performance of duties vested in the Commission. (5) Preparation before hearings Before the start of the first hearing under section 5, each member of the Commission shall prepare for such hearing by becoming familiar with the history of land grant-merced claims in the United States Southwest. This preparation may include— (A) the purchase, by the Commission, of pertinent literature on the subject for each Commission member to review