Maryland Code, Election Law § 12-305

(a)(1) A person that accepts public campaign financing under Title 15 of this article may not solicit or accept a donation on behalf of a contested election committee in excess of the contribution limits established under Title 15 of this article.

(2) A person that accepts public campaign financing under § 13-505 of this article may not solicit or accept a donation on behalf of a contested election committee in excess of the contribution limits established in law by the governing body of the county in accordance with § 13-505 of this article.

(b)(1) A contested election committee may not accept a loan other than a loan from:

(2) A loan under this subsection may be of any amount.