(a) On and after the effective date of this act, any provision of a restrictive covenant which prohibits the display of political yard signs, which are less than six square feet, during a period commencing 45 days before an election and ending two days after the election is hereby declared to be against public policy and such provision shall be void and unenforceable.

(b) The provisions of this section shall apply to any restrictive covenant in existence on the effective date of this act.