Each candidate must be treated equally with respect to the expense of such distribution. Thus, a union and its officers must honor a candidate's request for distribution where the candidate is willing and able to bear the expense of such distribution. However, should the candidate be unable to bear such expense, there is no requirement that the union distribute the literature of the candidate free of charge. In the event the union distributes any candidate's literature without charge, however, all other candidates are entitled to have their literature distributed on the same basis. Since labor organizations have an affirmative duty to comply with all reasonable requests of any candidate to distribute campaign literature (at the candidate's expense), a union rule refusing all such distributions would not be proper, even though applied in a nondiscriminatory fashion. In view of the fact that expenses of distribution are to be borne by the candidate a labor organization may not refuse to distribute campaign literature merely because it may have a small staff which cannot handle such distribution for all candidates. If this is the case, the organization may employ additional temporary staff or contract the job to a professional mailer and charge the expense incurred to the candidates for whom the service is being rendered. The organization may require candidates to tender in advance the estimated costs of distributing their literature, if such requirement is applied uniformly.