May 11 (Reuters) -
* MEXICO LABOR MINISTRY SAYS IT FOUND VARIOUS REASONS TO INVALIDATE UNION VOTE AT GM SILAO PLANT
* MEXICO LABOR MINISTRY SAYS GM UNION MUST RE-DO WORKER VOTE ON COLLECTIVE CONTRACT WITHIN 30 DAYS
May 11 (Reuters) -
* MEXICO LABOR MINISTRY SAYS IT FOUND VARIOUS REASONS TO INVALIDATE UNION VOTE AT GM SILAO PLANT
* MEXICO LABOR MINISTRY SAYS GM UNION MUST RE-DO WORKER VOTE ON COLLECTIVE CONTRACT WITHIN 30 DAYS