the approval of the Bank of Thailand or an authorized agent of the Bank of Thailand, which includes all commercial banks in Thailand, must be obtained immediately prior to each payment of any nature to be made· by the Borrower (except in the case of Baht payments made within Thailand), and the authorized agent of the Bank of Thailand retains a discretion to deny or impose conditions on any approval or remittance and may require relevant documents and evidence to be filed with it in connection with any application made to it; and