29 CFR 102.64: Conduct of hearing.

(a) The purpose of a hearing conducted under Section 9(c) of the Act is to determine if a question of representation exists. A question of representation exists if a proper petition has been filed concerning a unit appropriate for the purpose of collective bargaining or concerning a unit in which an individual or labor organization has been certified or is being currently recognized by the employer as the bargaining representative. Disputes concerning individuals' eligibility to vote or inclusion in an appropriate unit ordinarily need not be litigated or resolved before an election is conducted. If, upon the record of the hearing, the Regional Director finds that a question of representation exists, the director shall direct an election to resolve the question.

(b) Hearings shall be conducted by a Hearing Officer and shall be open to the public unless otherwise ordered by the Hearing Officer. At any time, a Hearing Officer may be substituted for the Hearing Officer previously presiding. Subject to the provisions of § 102.66, it shall be the duty of the Hearing Officer to inquire fully into all matters and issues necessary to obtain a full and complete record upon which the Board or the Regional Director may discharge their duties under Section 9(c) of the Act.

(c) The hearing shall continue from day to day until completed unless the Regional Director concludes that extraordinary circumstances warrant otherwise. The Regional Director may, in the director's discretion, adjourn the hearing to a different place by announcement thereof at the hearing or by other appropriate notice.