No person shall make any contributions which will cause the total amount of such person's contributions to a political party to exceed $20,000 during an election period. No treasurer or other person acting on behalf of any political party shall accept any contribution which such person knows will cause the total amount of the donor's contributions to a political party to exceed $20,000 during an election period. The contribution limits set forth in this chapter shall not be applicable to any contributions received by a political party from or on behalf of any national political party, any organization subordinate to such national political party or any other national political organization established for the purpose of supporting elections to national, state and local offices including, but not limited to, the Republican and Democratic Senatorial Campaign Committees, the Republican and Democratic Congressional Campaign Committees, the Republican and Democratic Victory Funds, the Republican and Democratic Governors' Associations.