9-503.

(a) A paid fire fighter, paid fire fighting instructor, or sworn member of the
Office of the State Fire Marshal employed by an airport authority, a county, a fire
control district, a municipality, or the State or a volunteer fire fighter, volunteer fire
fighting instructor, volunteer rescue squad member, or volunteer advanced life
support unit member who is a covered employee under § 9-234 of this title is
presumed to have an occupational disease that was suffered in the line of duty and is
compensable under this title if:

(1) the individual has heart disease, hypertension, or lung disease;

(2) the heart disease, hypertension, or lung disease results in partial or
total disability or death; and

(3) in the case of a volunteer fire fighter, volunteer fire fighting
instructor, volunteer rescue squad member, or volunteer advanced life support unit
member, the individual has met a suitable standard of physical examination before
becoming a fire fighter, fire fighting instructor, rescue squad member, or advanced
life support unit member.

(b) (1) A paid police officer employed by an airport authority, a county, the
Maryland-National Capital Park and Planning Commission, a municipality, or the
State, a deputy sheriff of Montgomery County, or, subject to paragraph (2) of this
subsection, a Prince George's County deputy sheriff is presumed to be suffering from
an occupational disease that was suffered in the line of duty and is compensable
under this title if:

(i) the police officer or deputy sheriff is suffering from heart
disease or hypertension; and

(ii) the heart disease or hypertension results in partial or total
disability or death.

(2) (i) A Prince George's County deputy sheriff is entitled to the
presumption under this subsection only to the extent that the individual suffers from
heart disease or hypertension that is more severe than the individual's heart disease
or hypertension condition existing prior to the individual's employment as a Prince
George's County deputy sheriff.

(ii) To be eligible for the presumption under this subsection, a
Prince George's County deputy sheriff, as a condition of employment, shall submit to
a medical examination to determine any heart disease or hypertension condition
existing prior to the individual's employment as a Prince George's County deputy
sheriff.

(c) A paid fire fighter, paid fire fighting instructor, or a sworn member of the
Office of the State Fire Marshal employed by an airport authority, a county, a fire
control district, a municipality, or the State or a volunteer fire fighter, volunteer fire
fighting instructor, volunteer rescue squad member, or volunteer advanced life
support unit member who is a covered employee under § 9-234 of this title is