29 C.F.R. § 102.64 : Labor — REGULATIONS RELATING TO LABOR — NATIONAL LABOR RELATIONS BOARD — RULES AND REGULATIONS, SERIES 8 — PROCEDURE UNDER SECTION 9(C) OF THE ACT FOR THE DETERMINATION OF QUESTIONS CONCERNING REPRESENTATION OF EMPLOYEES AND FOR CLARIFICATION OF BARGAINING UNITS AND FOR AMENDMENT OF CERTIFICATIONS UNDER SECTION 9(B) OF THE ACT — Conduct of hearing

(a) The primary 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 unit scope, voter eligibility and supervisory status will normally be litigated and resolved by the Regional Director before an election is directed. However, the parties may agree to permit disputed employees to vote subject to challenge, thereby deferring litigation concerning such disputes until after the election. 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.

29 C.F.R. §102.64

79 FR 74482, 12/15/2014; 82 FR 11754, 3/6/2017; 84 FR 69593, 4/16/2020