Where the union knows in advance that a substantial number or a particular segment of the members will not be able to exercise their right to vote in person, as, for example, when access to a polling place is impracticable for many members because of shipping assignments, absentee ballots or other means of voting must be made available.[45] In the event absentee ballots are necessary the organization must give its members reasonable notice of the availability of such ballots.[46]