1 In a bill of exchange payable on sight or at a stated period after presentation for acceptance, the drawer may stipulate that the bill amount will bear interest. For all other bills, the interest rate comment is deemed unwritten.
2 The interest rate must be indicated on the bill of exchange; where there is no such indication, the interest rate comment is deemed unwritten.
3 The interest accrues as of the date on which the bill of exchange was drawn, unless some other date is specified.