Boie-Takeda Chemicals, Inc. vs. De la Serna

Commissions earned by employees paid a fixed or guaranteed wage plus commission do not form part of the "basic salary" for computing the mandatory 13th-month pay under P.D. 851. An administrative guideline that includes commissions in the computation is invalid as it expands the law it implements, constituting an unauthorized amendment by the executive branch.

Presidential Decree No. 851 (the 13th Month Pay Law) and its original 1975 implementing rules defined "basic salary" as the basis for the benefit, explicitly excluding cost-of-living allowances, profit-sharing payments, and other allowances not integrated into the basic salary as of December 16, 1975. Supplementary Rules issued thereafter further excluded "overtime pay, earnings and other remunerations which are not part of the basic salary." In 1986, Memorandum Order No. 28 removed the P1,000 salary ceiling but did not alter the concept of "basic salary." In 1987, the DOLE issued Revised Guidelines which, in Section 5(a), stated that employees paid a fixed wage plus commission are entitled to 13th-month pay based on "total earnings," i.e., both fixed wage and commission.

• Nature of the Action: Two consolidated petitions for certiorari and prohibition challenging DOLE orders that computed 13th-month pay to include sales commissions.
• Boie-Takeda Chemicals, Inc.: Following a May 1989 inspection, a Notice of Inspection Results demanded restitution for underpayment of 13th-month pay (1986-1988) by excluding commissions earned by medical representatives. The Regional Director ordered payment. On appeal, Acting Secretary de la Serna affirmed but excluded commissions earned before the August 13, 1986 effectivity of Memorandum Order No. 28.
• Philippine Fuji Xerox Corp.: A September 1989 inspection found underpayment of 13th-month pay (1986-1988) for salesmen. The Regional Director ordered restitution. On appeal, Undersecretary Trajano denied the appeal.
• Common Contention: Both companies argued commissions are not part of "basic salary" under P.D. 851 and its original rules, and that the 1987 Revised Guidelines (Section 5(a)) were issued in excess of statutory authority.

• Statutory Authority: Petitioners maintained that P.D. 851 and its original implementing rules, as interpreted in San Miguel Corp. v. Inciong, define "basic salary" to exclude additional remunerations like commissions. The 1987 Revised Guidelines, by including commissions, unlawfully expanded the law.
• Contemporaneous Interpretation: Petitioners argued that a prior opinion by Labor Secretary Drilon himself affirmed the contemporaneous interpretation (by Secretary Ople) that commissions are excluded.
• Equal Protection: Assuming arguendo the Guidelines were valid, petitioners contended they violated the equal protection clause by creating an unreasonable classification.

• Procedural Bar: Respondents argued that a petition for certiorari is not the proper vehicle for a collateral attack on the constitutionality of an administrative issuance.
• Amendment by Memorandum Order: Respondents contended that Memorandum Order No. 28, which removed the salary ceiling, effectively amended P.D. 851 and made the Revised Guidelines' inclusion of commissions valid.
• Clarification of Gray Area: Respondents asserted the Revised Guidelines merely clarified the ambiguous treatment of commissions.
• Definition of "Wage": Respondents cited Songco v. NLRC, where "salary" under Article 97(f) of the Labor Code was interpreted to include commissions.

• Validity of the Revised Guidelines: Whether Section 5(a) of the 1987 Revised Guidelines on the 13th Month Pay Law, which includes commissions in the computation of the benefit, is a valid administrative implementation of P.D. 851, as amended.
• Grave Abuse of Discretion: Whether the respondent labor officials committed grave abuse of discretion amounting to lack of jurisdiction in applying the Revised Guidelines to order the inclusion of commissions in the 13th-month pay computation.

• Validity of the Revised Guidelines: The second paragraph of Section 5(a) of the Revised Guidelines is null and void. It unduly expanded the concept of "basic salary" as defined in P.D. 851 and its implementing rules, which consistently excluded additional earnings and remunerations like commissions. An administrative agency cannot amend a statute by widening its scope through implementing rules.
• Grave Abuse of Discretion: The respondent officials acted with grave abuse of discretion in applying the invalid provision. Their orders, being based on a void guideline, are without legal basis and must be set aside. Memorandum Order No. 28 did not alter the definition of "basic salary"; it only removed the salary ceiling.

• Hierarchy of Administrative Rules — Implementing rules and regulations must be in harmony with the provisions of the law they are intended to carry into effect. They cannot widen its scope or amend the legislative act. An administrative issuance that contradicts or supplants the statute is invalid.
• Definition of "Basic Salary" for 13th-Month Pay — Under P.D. 851 and its original implementing rules, "basic salary" refers to the rate of pay for a standard work period, exclusive of additional payments such as cost-of-living allowances, profit-sharing, overtime pay, premiums, holiday pay, night differentials, and commissions. These are considered "fringe" benefits or additional remunerations.

• "In remunerative schemes consisting of a fixed or guaranteed wage plus commission, the fixed or guaranteed wage is patently the 'basic salary' for this is what the employee receives for a standard work period. Commissions are given for extra efforts exerted in consummating sales or other related transactions. They are, as such, additional pay, which this Court has made clear do not form part of the 'basic salary.'"
• "It is a fundamental rule that implementing rules cannot add to or detract from the provisions of the law it is designed to implement. Administrative regulations adopted under legislative authority by a particular department must be in harmony with the provisions of the law they are intended to carry into effect. They cannot widen its scope. An administrative agency cannot amend an act of Congress."

• San Miguel Corp. v. Inciong, 103 SCRA 139 — Controlling precedent. The Court relied on this case's detailed delineation of what constitutes "basic salary" under P.D. 851, explicitly excluding overtime pay, earnings, and other remunerations not part of the basic salary.
• Songco v. National Labor Relations Commission, 183 SCRA 610 — Distinguished. The Court noted that Songco construed the generic term "salary" under the Labor Code, not the specific term "basic salary" under P.D. 851. The Court also pointed out that Songco itself acknowledged a distinction between "basic salary" and "commissions."
• Cebu Oxygen & Acetylene Co., Inc. v. Drilon, 176 SCRA 24 — Cited for the principle that administrative rules cannot amend a statute.

• Presidential Decree No. 851 (Thirteenth Month Pay Law) — The law mandates a 13th-month pay for all rank-and-file employees, computed based on "basic salary." The Court interpreted this term as excluding commissions.
• Revised Guidelines on the Implementation of the 13th Month Pay Law (November 16, 1987), Section 5(a) — The specific provision declared void for including commissions in the computation of 13th-month pay for employees paid a fixed wage plus commission.
• Memorandum Order No. 28 (August 13, 1986) — Interpreted as merely removing the P1,000 salary ceiling from P.D. 851, not altering the definition of "basic salary."

• Justice Teodoro R. Padilla
• Justice Florenz D. Regalado
• Justice Jose C. Noel
• Justice Reynato S. Puno