Md. Code, Family Law § 5–3B–20

(a) This section does not apply to an adoption of an adult.

(b) A court may enter an order for adoption only if:

(1) (i) 1. each of the prospective adoptee’s living parents consents:

A. in writing; or

B. by failure to timely file notice of objection after being served with a show–cause order in accordance with this subtitle;

2. an administrative, executive, or judicial body of a state or other jurisdiction has granted a governmental unit or person other than a parent the power to consent to adoption, and the unit or person consents; or

3. parental rights have been terminated in compliance with the laws of a state or other jurisdiction, as described in § 5–3B–04 of this subtitle; and

(ii) if the prospective adoptee is at least 10 years old, the prospective adoptee consents; or

(2) in accordance with § 5–3B–22 of this subtitle, the court orders adoption without consent otherwise required under this section.