G.R. No. 183122 & 183889; June 15, 2011
General Milling Corporation-Independent Labor Union (GMC-ILU) vs. General Milling Corporation; and General Milling Corporation vs. General Milling Corporation-Independent Labor Union (GMC-ILU), et al.

FACTS

On April 28, 1989, General Milling Corporation (GMC) and the General Milling Corporation-Independent Labor Union (the Union) entered into a three-year Collective Bargaining Agreement (CBA) retroactive to December 1, 1988. On November 29, 1991, one day before the CBA’s expiration, the Union sent a draft CBA proposal to GMC and requested counter-proposals. GMC failed to reply. The Union filed an unfair labor practice complaint (RAB Case No. VII-06-0475-92), initially dismissed but later reversed on appeal by the NLRC on January 30, 1998. The NLRC ordered the imposition of the Union’s draft CBA proposal for the remaining two years of the original term (December 1, 1991 to November 30, 1993). This NLRC decision was eventually affirmed with finality by the Supreme Court in G.R. No. 146728 on February 11, 2004, which held GMC guilty of unfair labor practice for refusing to bargain in good faith by not submitting a counter-proposal.
After the decision became final, the Union filed a motion for execution to compute and enforce the monetary benefits under the imposed CBA, claiming approximately ₱433,786,786.36. GMC opposed the motion, citing supervening events: the bargaining unit no longer existed due to resignations, retirements, retrenchments, and separations; many employees had executed waivers and quitclaims; employees had already received salary increases and benefits for 1991-1993; and the decision only called for the execution of a CBA, not an immediate computation of monetary benefits. GMC also sought to exclude specific groups of employees from coverage.
Executive Labor Arbiter Violeta Ortiz-Bantug issued an Order on October 27, 2005, limiting the computation of benefits to the remaining two years of the CBA (1991-1993) and ordering the parties to compute the benefits guided by the imposed CBA’s terms. Both parties appealed to the NLRC. The NLRC, in its Decision dated July 20, 2006, affirmed the Labor Arbiter’s order. The NLRC held that the imposed CBA’s economic provisions should be effective only for its two-year term and that benefits already voluntarily given by GMC should be deducted. It also referred the detailed computation of specific benefits (like overtime, holiday pay) to the grievance machinery under the CBA. Both parties filed separate petitions for certiorari with the Court of Appeals.

ISSUE

The core issue, consolidated from both petitions, is the proper implementation and computation of monetary benefits arising from the final and executory Supreme Court decision which imposed the Union’s draft CBA proposal on GMC for the period December 1, 1991 to November 30, 1993, particularly in light of GMC’s claims of supervening events (quitclaims, voluntary benefits, changed employment status).

RULING

The Supreme Court denied both petitions and affirmed the assailed Court of Appeals Decisions with modifications, essentially upholding the NLRC’s framework for computation.
1. Period of Effectivity: The imposed CBA is effective only for its stipulated two-year term from December 1, 1991 to November 30, 1993. Claims for benefits outside this period are not granted.
2. Coverage of Employees: The benefits under the imposed CBA extend to all employees within the bargaining unit during the effective period, including union members and non-members, and those hired within the term. However, employees validly retrenched or separated for cause during the period are not entitled to benefits accruing after their separation.
3. Quitclaims and Waivers: Quitclaims executed by employees are valid and binding only if they constitute a voluntary and reasonable settlement of a credible claim. Those executed prior to the finality of the Supreme Court’s decision (February 11, 2004) are void, as the claims were not yet established or liquidated. Post-finality quitclaims may be valid if they meet the criteria for a valid waiver.
4. Voluntary Benefits by GMC: Salary increases and other benefits voluntarily granted by GMC to its employees during the period 1991-1993 should be deducted from the economic benefits due under the imposed CBA to prevent double recovery.
5. Specific Benefit Computation: The detailed computation of specific benefits (e.g., overtime pay, night shift differentials, holiday pay) must consider the actual work rendered by each employee based on time records. The case was referred to the grievance machinery established under the imposed CBA to undertake this detailed recomputation, guided by the principles laid down by the Court.
6. Vacation and Sick Leave Differentials: The claims for vacation and sick leave salary rate differentials were excluded, as the imposed CBA provisions did not provide for the monetization of unused leaves but only for their conversion or carry-over.
7. Managerial/Supervisory Employees: Employees promoted to managerial, supervisory, or confidential positions before or during the CBA effectivity period are excluded from the rank-and-file bargaining unit and its CBA coverage.
The dispositive portion of the Supreme Court’s Decision ordered the referral of the case to the grievance machinery for recomputation of benefits in accordance with these guidelines.