The terms used in this chapter shall have the significance herein defined unless another meaning is clearly apparent in language or context. 1. The term "political unit" means the state or any political subdivision thereof or therein. 2. The term "unit of representation" means any political unit from which members of any committee or delegates to a party convention shall be elected as provided in this chapter. 3. The term "party" means any political organization which , excluding blank and void ballots