Article 4. For the Special Account, the revenue shall include sales of the materials and incomes from its accumulated reserve fund, transfers therefrom, and money transferred from the General Account, and the expenditure shall consist of payments in cash for the materials purchased, redemption of and interest on registered national bonds issued by the government and handed over in consideration of the materials acquired by the government, interest on short term loans, sundry expenses contingent to the issue and redemption of registered national bonds, business expenses, commissions paid to the public corporations, rewards to suppliers of information regarding the meterials, money transferred to the General Account and accessory sundry expenses.