The Legal Status of the Parties to a Joint Operating Agreement (KSO) Based on the Principle of ‘Pacta Sunt Servanda’ (Case Study: Court Judgment No. 391/Pdt.G./2024/Pn. Jkt.Utr.)

Authors

  • Melinda Endarti Universitas Esa Unggul
  • Annisa Fitria Universitas Esa Unggul
  • Dyah Permata Budi Asri Universitas Esa Unggul
  • Rita Alfiana Universitas Esa Unggul

DOI:

https://doi.org/10.38035/jlph.v6i6.3736

Keywords:

Joint Operating Agreement, KSO, Pacta Sunt Servanda, Breach of Contract, Civil Law

Abstract

An Operational Cooperation Agreement (KSO) is a form of unnamed contract (innominate contract) that has developed in accordance with the principle of freedom of contract as set out in the Civil Code. In practice, KSOs often give rise to disputes due to the failure of the parties to fulfil their rights and obligations. This study aims to analyse the legal status of the Operational Cooperation Agreement (KSO), the forms of breach of contract, and the legal consequences arising therefrom based on Judgment No. 391/Pdt.G./2024/PN Jkt.Utr. The study employs a normative legal method using a statutory approach, a conceptual approach, and a case-based approach. The legal materials used include primary, secondary, and tertiary sources, which were analysed qualitatively through deductive reasoning. The results of the study indicate that an Operational Cooperation Agreement (KSO) is legally binding in accordance with the provisions of Article 1338 of the Civil Code; consequently, the parties are obliged to fulfil the terms of the agreement in good faith. Breach of contract in this case occurred because one party failed to fulfil its agreed obligations, thereby causing loss to the other party. The court’s ruling confirms that a breach of the terms of a contract gives rise to legal liability in the form of an obligation to pay damages in accordance with the provisions of civil law. It is hoped that this research will contribute to the development of contract law, particularly with regard to the resolution of disputes arising from Production Sharing Agreements in Indonesia.

References

Ariayuda, A., Hardjomuldjadi, S., Samian, S., & Wibowo, D. E. (2025). The Binding Force Of Goods/Services Procurement Contracts From The Perspective Of Article 1338 Of The Indonesian Civil Code. Interdisciplinary Social Studies, 5(1), 359–368.

Cahyaningtyas, K., & Wibowo, E. A. (2023). Implementasi “Good Faith” Pada Perjanjian Kerjasama Antara Perusahaan Beda Negara. Jurnal Hukum: Sumber Hukum, 1(1), 1–18. Https://Doi.Org/Https://Www.Jurnal.Stie-Aas.Ac.Id/Index.Php/SH/Article/View/12554

Cahyo, Y. T., & Kurnianingsih, M. (2023). Pacta Sunt Servanda: Legal Dynamics In Indonesian Context. Walisongo Law Review (Walrev), 5(1). Https://Doi.Org/10.21580/Walrev/2023.5.1.14585

Dali, M. W., Mahmud, Y. I., Hasan, E. R., Talamati, A. A., Tuu, R. A. D., Monoarfa, M. L. A., Nakuu, S. L., Richard, K., Ali, M. F. R., Rias, R. U., Kango, I., & Ibrahim, R. (2025). Eksistensi Dan Implementasi Asas Pacta Sunt Servanda Dalam Sistem Hukum Perjanjian. Jurnal Penelitian Dan Pengkajian Ilmiah, 2(12), 2226–2233. Https://Doi.Org/Https://Doi.Org/10.62335/Cendekia.V2i12.2125

Kadafi, A. A., Hastuti, R., & Iqbal, M. (2025). A Juridical Review Of Breach Of Contract In Commercial Cooperation Agreements In Indonesia. Justicia Insight, 1(2), 50–55.

Pambudi, B. A., & Yustanti, D. E. (2025). Position Of Operational Cooperation (KSO) Made Without Notary Deed In Civil Law System And How Responsible Towards Third Parties. Jurnal Hukum Sehasen, 11(1), 237–244.

Priyono, E. A., Saputra, D. A., Nugroho, S. S., & Asih, D. T. (2025). Standard Agreements: Review Of The Principles Pacta Sunt Servanda, Good Faith And Fairness. Lex Scientia Law Review, 9(2), 1376–1407.

Rosalind, M., & Sari, R. D. P. (2023). Wanprestasi Badan Usaha Dalam Perjanjian Kerjasama Operasional. Jurnal Rechtens, 12(1), 83–100.

Sari, D. N. (2019). Karakteristik Perjanjian Kerjasama Operasi/Joint. Lex Lata Jurnal Ilmiah Imu Hukum, 1(3), 199–210.

Sujoko, A. (2020). Teori Dan Praktik Berkontrak Dengan Penyedia Kerja Sama Operasi (KSO) Dalam Pengadaan Barang / Jasa Pemerintah. Administrative Law & Governance Journal, 2(1), 35–53. Https://Doi.Org/Https://Doi.Org/10.14710/Alj.V3i1.35-53

Syamsiah, D., Bao, R. M. B., & Yuliana, N. F. (2023). Dasar Penerapan Asas Pacta Suntservanda Dalam Perjanjian. Jurnal Hukum Das Sollen, 9(2).

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Published

2026-09-05

How to Cite

Endarti, M., Fitria, A., Asri, D. P. B., & Alfiana, R. (2026). The Legal Status of the Parties to a Joint Operating Agreement (KSO) Based on the Principle of ‘Pacta Sunt Servanda’ (Case Study: Court Judgment No. 391/Pdt.G./2024/Pn. Jkt.Utr.). Journal of Law, Politic and Humanities, 6(6), 4587–4600. https://doi.org/10.38035/jlph.v6i6.3736

Issue

Vol. 6 No. 6 (2026): (JLPH) Journal of Law, Politic and Humanities

Section

Articles

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Copyright (c) 2026 Melinda Endarti, Annisa Fitria, Dyah Permata Budi Asri, Rita Alfiana

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