(a) General rule.— An individual may not be elected to a county office, except the office of district attorney, as provided for under this part, unless the person is:
(1) at least 18 years of age;
(2) a citizen of the United States;
(3) a resident of the county; and
(4) has resided within the county for at least the directly preceding year prior to the election.
(b) Sheriff.— In addition to the qualifications under subsection (a), an individual may not be eligible for the office of sheriff except in accordance with 44 Pa.C.S. Ch. 74 Subch. C (relating to sheriff and deputy sheriff education and training).