Maryland Code, BUSINESS REGULATION 15-208
(b) Subject to subsection (c) of this section, each accessible room in a lodging establishment shall be furnished with a bed that:
(1) measures at least 20 inches but not more than 23 inches high from the floor to the top of the mattress, whether or not the mattress is compressed; and
(2) has at least a 7-inch vertical clearance under the bed for lift access.
(c) (1) Beginning December 31, 2022, each lodging establishment shall furnish at least 25% of the lodging establishment’s accessible rooms with a bed that meets the requirements of subsection (b) of this section.
(2) Beginning December 31, 2023, each lodging establishment shall furnish at least 50% of the lodging establishment’s accessible rooms with a bed that meets the requirements of subsection (b) of this section.
(3) Beginning December 31, 2024, each lodging establishment shall furnish at least 75% of the lodging establishment’s accessible rooms with a bed that meets the requirements of subsection (b) of this section.
(4) Beginning December 31, 2025, each accessible room in a lodging establishment shall be furnished with a bed that meets the requirements of subsection (b) of this section.