Maryland Real Property Section 10-107

      (a)      Every vendor under a land installment contract shall mail or deliver a statement to the purchaser:

            (1)      When 40 percent of the original cash price has been paid; and

            (2)      (i)      Annually within 30 days of January 1; or

                  (ii)      On demand of the purchaser no more than twice a year.

      (b)      The statement shall show:

            (1)      The total amount paid for any ground rent, insurance, taxes, and any other periodic charge;

            (2)      The amount credited to principal and interest; and

            (3)      The balance due.