Md. Code, Family Law § 5–319

(a) Subject to subsection (b) of this section, a juvenile court shall rule on a guardianship petition:

(1) within 180 days after the petition is filed; and

(2) within 45 days after the earlier of:

(i) receipt of all of the consents required under this Part II of this subtitle; or

(ii) trial on the merits.

(b) A juvenile court may not enter an order for guardianship of a child under this subtitle before the later of:

(1) 30 days after the birth of the child;

(2) expiration of the time set for revocation of consent, and not waived, under § 5–321(c) of this subtitle; or

(3) expiration of the time to respond to the show–cause order issued under § 5–316 of this subtitle.