Coca-Cola Philippines management chooses "No Union" for half the workers before union certification election

In the lead up to a certification election for the newly formed Coca-Cola Monthlies Union-Canlubang Plant (CCMU) in the Philippines management reduced the list of employees eligible to vote from 55 workers to 25.
When CCMU registered in May it was recognized by the labour department which issued an order in July to conduct a certification election where all eligible workers could choose:  "Coca-Cola Monthlies Union-Canlubang Plant" or "No Union". 
In preparation for the certification election the union submitted a list of 55 rank-and-file monthly paid employees at the Coca-Cola Canlubang Plant. But management contacted the labour department calling for the exclusion of 30 rank-and-file workers on the basis that they are "confidential employees and no right to direct participate the said certification election". 
These same workers were NOT confidential employees at the last certification election in November 2010. Now that the union is likely to win management has suddenly changed the workers’ status to strip them of the right to vote.
The message from Coca-Cola Philippines (which is 51% owned by FEMSA and 49% owned by TCCC) is that company policy can arbitrarily determine who has the internationally recognized human right to join a union. This contravenes the UN Guiding Principles on Business and Human Rights and the OECD Guidelines on Multinational Enterprises which TCCC claims to respect.
In response to the exclusion of 30 workers from the right to join a union, ACCUP leaders observed that the Labor Relations and HR managers who were recruited when TCCC owned the Philippines operations have maintained their aggressive anti-union stance even after FEMSA took over the company. 
CCMU is a member of the IUF-affiliated ACCUP and the Federation and Cooperation of Cola, Beverage and Allied Industry Union FCCU-SENTRO.