G.R. No. L-18939. August 31, 1964.
NATIONAL WATERWORKS AND SEWERAGE AUTHORITY, petitioner, vs. NWSA CONSOLIDATED UNIONS, ET AL., respondents.

FACTS

The National Waterworks and Sewerage Authority (NAWASA), a government-owned corporation, and the respondent labor unions were involved in an industrial dispute certified by the President to the Court of Industrial Relations (CIR). The unions’ demands included issues like the 40-hour work week, distress pay, and wage computations. The parties submitted a joint stipulation of facts on several issues. Subsequently, a group of employees, the intervenors, filed a petition in intervention, later amended to include a new claim for overtime pay for specific employees earning P4,200 per annum or more. NAWASA moved to dismiss this overtime claim, arguing the CIR lacked jurisdiction as it was a new issue raised by intervenors and not part of the principal case’s lis mota. The CIR denied the motion and allowed the issue to be litigated.
The CIR rendered a decision favorable to the unions and intervenors on multiple points, including holding that NAWASA was not performing governmental functions and was thus liable for overtime and holiday pay under Commonwealth Act No. 444 (Eight-Hour Labor Law). It also ruled on computation methods for daily wages and the applicability of minimum wage awards. NAWASA’s motion for reconsideration was denied, prompting this petition for review raising several questions of law.

ISSUE

The primary legal issues included: (1) whether NAWASA performs governmental functions exempting it from the Eight-Hour Labor Law; (2) whether the CIR had jurisdiction over the overtime pay claim raised by intervenors; (3) whether certain employees were “managerial” and thus exempt; and (4) the correct methods for computing daily wages and overtime compensation.

RULING

The Supreme Court affirmed the CIR decision with modifications. On jurisdiction, the Court held the CIR validly acquired jurisdiction over the overtime claim. The legal logic is that the CIR’s jurisdiction over the entire industrial dispute, certified by the President, is continuing and comprehensive. Once jurisdiction attaches, it extends to all matters incidental to the employer-employee relationship between the parties, including new claims raised by intervenors who are similarly situated employees. The technical distinction between principal parties and intervenors does not oust the CIR’s authority to resolve all related labor issues to achieve industrial peace.
On the substantive issues, the Court ruled NAWASA is not performing governmental but proprietary functions. While providing a public utility service, its operations are essentially commercial and business-oriented, similar to a private corporation. Therefore, it is subject to the Eight-Hour Labor Law and liable for overtime and holiday pay. Employees assigned from the General Auditing Office and Bureau of Public Works to NAWASA remain national government employees for compensation purposes and are not covered by the Labor Law as to NAWASA. The Court upheld the CIR’s disapproval of NAWASA’s practice of offsetting undertime against overtime, deeming it unfair. For wage computation, the additional 25% pay for Sunday work is part of the legal wage and should be included in calculating the daily rate for relevant employees. For monthly salaried employees, the correct method is to divide the monthly salary by the actual number of working days in the month, not by a fixed 30 days. The Court also affirmed the applicability of prior minimum wage awards to subsequently hired workers and the entitlement to distress pay for applicable laborers.