Section 10. Article 256 of the Labor Code is hereby amended to read as follows:

"ART. 256. Representation Issue in Organized Establishments. — In organized establishments, when a verified petition questioning the majority status of the incumbent bargaining agent is filed by any legitimate labor organization including a national union or federation which has already issued a charter certificate to its local chapter participating in the certification election or a local chapter which has been issued a charter certificate by the national union or federation before the Department of Labor and Employment within the sixty (60)-day period before the expiration of the collective bargaining agreement, the Med-Arbiter shall automatically order an election by secret ballot when the verified petition is supported by the written consent of at least twenty-five percent (25%) of all the employees in the bargaining unit to ascertain the will of the employees in the appropriate bargaining unit. To have a valid election, at least a majority of all eligible voters in the unit must have cast their votes. The labor union receiving the majority of the valid votes cast shall be certified as the exclusive bargaining agent of all the workers in the unit. When an election which provides for three or more choices results in no choice receiving a majority of the valid votes cast, a run-off election shall be conducted between the labor unions receiving the two highest number of votes: Provided, That the total number of votes for all contending unions is at least fifty percent (50%) of the number of votes cast. In cases where the petition was filed by a national union or federation, it shall not be required to disclose the names of the local chapter's officers and members.

At the expiration of the freedom period, the employer shall continue to recognize the majority status of the incumbent bargaining agent where no petition for certification election is filed."