The only qualification to hold any office of the Commonwealth or of its governmental units, elective by the people, shall be that a person must have been a resident of the Commonwealth for one year next preceding his election and be qualified to vote for that office, except as otherwise provided in this Constitution, and except that:

  (a) the General Assembly may impose more restrictive geographical residence requirements for election of its members, and may permit other governing bodies in the Commonwealth to impose more restrictive geographical residence requirements for election to such governing bodies, but no such requirements shall impair equal representation of the persons entitled to vote;

  (b) the General Assembly may provide that residence in a local governmental unit is not required for election to designated elective offices in local governments, other than membership in the local governing body; and

  (c) nothing in this Constitution shall limit the power of the General Assembly to prevent conflict of interests, dual officeholding, or other incompatible activities by elective or appointive officials of the Commonwealth or of any political subdivision.

The amendment ratified November 2, 1976 and effective January 1, 1977 In paragraph one, after "one year", added the language "next preceding his election".