Maryland Estates and Trusts Section 4-401

      A legatee, other than his spouse, who fails to survive the testator by 30 full days is considered to have predeceased the testator, unless the will of the testator expressly creates a presumption that the legatee is considered to survive the testator or requires that the legatee survives the testator for a stated period in order to take under the will and the legatee survives for the stated period.