Md. Code Ann., Fam. Law § 5-3B-26
If a petition to invalidate an order under this subtitle on the basis of a jurisdictional or procedural defect is filed more than 1 year after entry of the order, a court shall dismiss the petition.
Added as Family Law § 5-3B-25 by Acts 2005, c. 464, § 3, eff. Jan. 1, 2006. Renumbered as Family Law § 5-3B-26 by Acts 2006, c. 365, § 1, eff. June 1, 2006.