The secretary-treasurer of the board of trustees shall be the custodian of the several funds. All payments from these funds shall be made by him or the assistant secretary-treasurer only upon vouchers signed by two persons designated by the board of trustees. The secretary-treasurer and assistant secretary-treasurer of the board of trustees shall furnish said board a surety bond in a company authorized to do business in Louisiana in such an amount as shall be required by the board, the premium to be paid from the expense fund.
La. Consolidated Public Retirement § 11:852