Every candidate for nomination for any office at any primary shall, before he files his declaration of candidacy, pay a fee equal to two percent of one year’s minimum salary attached to the office for which he is candidate in effect in the year in which he files. In case of an office for which compensation is paid in whole or in part by fees, the amount to be paid by a candidate as his contribution for the payment of the expenses of the primary shall be fixed by the proper committee of the respective parties. If there is no salary or fee attached to the office, the fee for primary expenses shall be five dollars. This provision includes candidates for party committees in § 24.2-518.