ARTICLE IV
During the time of construction of the Railway the interest on the Bonds and on any advances made by the Contractors shall be paid from the proceeds of the Loan. The accruing interest from any proceeds of the Loan not used during the period of construction, and the earnings derived by the Corporation from the working of any sections of the Railway as they are built, are to be used to make up the amount required for the payment of the said interest, and if any deficiency remains it is to be met from the proceeds of the Loan.
When the construction of the Railway is wholly completed, the interest on the Bonds is to be paid from the income or earnings of the Railway received by the Corporation, in such manner and on such dates as may be provided for in the Detailed Agreement provided for in Article 17 of this Agreement.
If, at any time, the earnings of the Railway, together with the funds available from the proceeds of the Loan, are not sufficient to meet the interest on the Bonds and the repayment of the capital in accordance with the Amortization Schedule to be attached to the Detailed Agreement, the Government of the Republic of China, in approving of this Agreement, unconditionally undertakes and promises to pay the principal of the Loan and the interest of the Loan on the due dates to be fixed therefor in the Detailed Agreement provided for in Article 17 of this Agreement.