Md. Code, Family Law § 5–1048

A finding of paternity established in any other state shall have the same force and effect in a proceeding under this subtitle as in any other civil proceeding in this State if:

(1) with respect to an adjudication of paternity, the finding was established by a court or by an administrative process that includes a right to appeal to a court; or

(2) with respect to a finding of paternity that is based on an affidavit of parentage, the affidavit was signed after each signatory to the affidavit was advised of their legal rights.