California Code of Regulations
Title 8 - Industrial Relations
Division 3 - Public Employment Relations Board
Chapter 6 - Representation Proceedings Under Public Utilities Code Transit District Acts
Subchapter 2 - Representation Procedures Under the los Angeles County Metropolitan Transportation Authority Transit Employer-Employee Relations Act
Article 3 - Petition for Certification
Section 71110 - Determination of Proof of Support

(a) Within 20 days of the date of service of a copy of the petition for certification, the employer shall file an alphabetical list, including job titles or classifications, of the employees employed in the claimed unit as of the last date of the payroll period immediately preceding the date the petition was filed, unless otherwise directed by the Board.

(b) If after initial determination, the proof of support is insufficient, the Board may allow up to 10 days to perfect the proof of support.

(c) Upon completion of the review of the proof of support, the Board shall inform the parties in writing of the determination as to sufficiency or lack thereof regarding the proof of support.