Maryland Commercial Law Section 14-2202

      (a)      The provisions of this subtitle do not apply to a transaction:

            (1)      Made in accordance with prior negotiations in the course of a visit by the consumer to a merchant operating a retail business establishment which has a fixed permanent location and where consumer goods are displayed or offered for sale on a continuing basis;

            (2)      In which the person making the solicitation or the business enterprise for which the person is calling:

                  (i)      Has made a previous sale to the consumer; or

                  (ii)      Has a preexisting business relationship with the consumer;

            (3)      Which is covered by the provisions of Subtitle 3 of this title;

            (4)      In which:

                  (i)      The consumer may obtain a full refund for the return of undamaged and unused goods to the seller within 7 days of receipt by the consumer; and

                  (ii)      The seller will process the refund within 30 days of receipt of the returned merchandise by the consumer;

            (5)      In which the consumer purchases goods or services pursuant to an examination of a television, radio, or print advertisement or a sample, brochure, catalogue, or other mailing material of the merchant that contains:

                  (i)      The name, address, and telephone number of the merchant;

                  (ii)      A description of the goods or services being sold; and

                  (iii)      Any limitations or restrictions that apply to the offer; or

            (6)      In which the merchant is a bona fide charitable organization as defined in § 6-101 of the Business Regulation Article.

      (b)      Notwithstanding subsection (a) of this section, this subtitle applies to any solicitation offering credit services where:

            (1)      The consumer is required to call a telephone number;

            (2)      The consumer is charged a separate toll fee for the call; and

            (3)      The person making the solicitation receives any portion of the separate telephone toll fee paid by the consumer.