Manila International Airport Authority v. Avia Filipinas International
REITERATIONFacts
The Antecedents: Petitioner Manila International Airport Authority (MIAA) entered into a one-year contract of lease with respondent Avia Filipinas International Corporation (AFIC) for aircraft repair station and chartering operations. The monthly rental was ₱6,580.00. MIAA issued Administrative Order No. 1, Series of 1990, revising rates and increasing the monthly rental to ₱15,996.50 effective December 1, 1990. MIAA did not require AFIC to pay the increased rate, and AFIC continued paying the original fee. After the contract expired, AFIC continued occupying the premises under an implied monthly lease, still paying the original rate without protest from MIAA. Three years later, MIAA billed AFIC for the difference in rentals from September 1, 1991, to September 30, 1994, amounting to ₱347,300.50. AFIC paid the increased rate from October 1994 onwards but refused to pay the lump sum. MIAA denied AFIC employees access to the premises from July 1, 1997, to March 11, 1998, due to non-payment of the disputed amount, despite AFIC continuing to pay the original rentals. Procedural History: AFIC filed a complaint for damages with injunction against MIAA, seeking uninterrupted access, actual and exemplary damages, refund of rentals paid during the period of denial of access, and attorney's fees. MIAA counterclaimed, asserting its right to increase rentals, claiming rental arrears, and justifying the denial of access based on the contract's termination clause for non-payment. The RTC ruled in favor of AFIC, awarding actual damages, exemplary damages, refund of rentals with interest, and attorney's fees. The CA affirmed with modification, deleting actual and exemplary damages but maintaining the refund of rentals with interest and attorney's fees. The CA denied MIAA's motion for reconsideration. The Petition: MIAA seeks reversal, arguing the CA erred in interpreting the lease contract and Civil Code provisions, denying its right to increase rentals, and ruling against its actions in denying access. MIAA also questions the applicability of unjust enrichment and the entitlement to attorney's fees.
Issue(s)
Whether the Court of Appeals correctly interpreted the provisions of the lease contract in line with the Civil Code and existing jurisprudence on contracts. Whether the principle of unjust enrichment is applicable to the instant case. Whether respondent is entitled to attorney's fees.
Ruling
The petition is denied. The Decision and Resolution of the Court of Appeals are affirmed. The RTC is ordered to comply with Supreme Court Administrative Circular No. 10-2000.
Ratio Decidendi
On the interpretation of the lease contract and Civil Code provisions: The Court affirmed the CA's ruling that Article II, Paragraph 2.04 of the lease contract, which states that amendments to administrative orders affecting rentals shall be deemed incorporated, must be read in conjunction with Article VIII, Paragraph 8.13, requiring any amendment, alteration, or modification to be in writing and signed by both parties. Since there was no showing that AFIC gave its written acquiescence to the increased rental rates from September 1, 1991, to September 30, 1994, MIAA could not unilaterally impose these increases. The Court also applied Article 1235 of the Civil Code, stating that when an obligee accepts incomplete performance without protest, the obligation is deemed fully complied with. MIAA's acceptance and issuance of receipts for the original rental fee without protest for 37 months estopped it from claiming the difference. On the applicability of unjust enrichment: The Court found that MIAA's act of denying AFIC access to the leased premises from July 1, 1997, to March 11, 1998, was unjustified because it was based on AFIC's non-payment of rental fees that MIAA had no legal basis to impose. This denial of access violated MIAA's obligation under Article 1654(3) of the Civil Code to maintain the lessee in the peaceful and adequate enjoyment of the lease. Consequently, under Article 1658 of the Civil Code, AFIC had no duty to make rent payments during that period. Allowing MIAA to retain the rental fees paid by AFIC during the period of denial of access would constitute unjust enrichment, as MIAA acquired a benefit at the expense of AFIC without just or legal ground, violating the principles of justice, equity, and good conscience. On the entitlement to attorney's fees: The Court agreed with the CA that AFIC is entitled to attorney's fees. MIAA's unjustified denial of access to the leased premises compelled AFIC to litigate and incur expenses to protect its interests, a valid ground for awarding attorney's fees under Article 2208 of the Civil Code. Furthermore, under the circumstances, attorney's fees may be granted on grounds of justice and equity, as MIAA's actions were unwarranted and caused AFIC to incur costs.
Main Doctrine
A lease contract provision allowing automatic incorporation of amendments to administrative orders regarding rentals is subject to another provision requiring written consent signed by both parties for any contract modification. Acceptance of partial performance without protest estops the lessor from claiming the difference.