1206.2—Percentage of valid authorizations required to determine existence of a representation dispute.
(a)
Where the employees involved in a representation dispute are represented by an individual or labor organization, either local or national in scope and are covered by a valid existing contract between such representative and the carrier a showing of proved authorizations (checked and verified as to date, signature, and employment status) from at least a majority of the craft or class must be made before the National Mediation Board will authorize an election or otherwise determine the representation desires of the employees under the provisions of section 2, Ninth, of the Railway Labor Act.
(b)
Where the employees involved in a representation dispute are unrepresented, a showing of proved authorizations from at least thirty-five (35) percent of the employees in the craft or class must be made before the National Mediation Board will authorize an election or otherwise determine the representation desires of the employees under the provisions of section 2, Ninth, of the Railway Labor Act.