Maryland Code, Housing and Community Development § 4-249

(1) the redemption price at the time of the purchase, plus accrued interest to the next interest payment date, if the note or bond is redeemable, at the time of the purchase; or

(2) the redemption price on the first date after the purchase on which the note or bond becomes redeemable, plus accrued interest to that date, if the note or bond is not redeemable at the time of the purchase.