(a)      (1)      In this section the following words have the meanings indicated.

            (2)      "Chief executive officer" means:

                  (i)      The Mayor of Baltimore City; or

                  (ii)      The County Executive of Montgomery County.

            (3)      "Political subdivision" means:

                  (i)      Baltimore City; or

                  (ii)      Montgomery County.

      (b)      Except as provided in subsection (c) of this section, a candidate for the office of the chief executive officer of a political subdivision shall be a resident of the political subdivision for at least 6 months preceding the general election for the chief executive officer.

      (c)      If the charter of a political subdivision contains a durational residency requirement that is longer than 6 months, the longer durational residency requirement shall be retained if the governing body of the political subdivision reaffirms the longer durational residency requirement by enactment of an ordinance effective no later than 4 weeks prior to the filing deadline specified in § 5-303(a) of the Election Law Article.