Which of the following statements are true about promissory notes? Multiple select question. The days of grace are not included in the interest period for calculating the maturity value value of the note on the legal due date. The maturity value of a non-interest-bearing note is the same as its face value. For terms of one year or less, it is understood that the simple-interest method should be used. The maturity value of a interest-bearing note is the same as its face value.