Md. Code Ann., Tax-Prop. § 8-233 — § 8-233

(a) In this section, “change” includes an improvement or an addition.
(b) Subject to the provisions of this section, a change to a building may not be assessed to the owner of the building for the period of time that a resident of the building with a health or medical condition occupies the building if:
(1) the building is used as a dwelling; and
(2) the change to the building is required for the health or medical condition of the resident of the building.
(c) The owner of the building shall submit to the supervisor:
(1) a statement from a licensed physician showing sufficient evidence of medical necessity or a substantial physical inconvenience of the resident; and
(2) annually an affirmation that the resident lives in the building.
(d) The assessment of the changes exempted under this section may not exceed 10% of the total assessment of the real property on which the building is located.
(e) The Department shall adopt regulations to provide:
(1) criteria to determine what is sufficient evidence of a health or medical condition;
(2) the form of the annual affirmation of residence; and
(3) criteria to determine what changes are required for the health or medical condition.