The members of the board of park commissioners shall possess the qualifications of electors of the city and must be elected by the qualified electors of the park district. The members of the first board may be elected at any regular city election or at a special election called for that purpose by the governing body of the city. Thereafter, members of the board must be elected at the regular city elections. Such members shall qualify by the first day of July following their election by taking and filing with the city auditor the oath prescribed for civil officers. The board of park commissioners may enter into an agreement with the governing body of the city concerning sharing of election personnel, printing of election materials, and apportioning of election expenses.