2020 Fourth Protocol to Amend the ASEAN Comprehensive Investment Agreement

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Full Title	2020 Fourth Protocol to Amend the ASEAN Comprehensive Investment Agreement
Short Title / Abbreviations	2020 ACIA 4th Protocol / ACIA Protocol 4
CIL Subject Classification	ASEAN Documents ASEAN Economic Community ASEAN Economic Ministers Investment
Date of Adoption	15/07/2020
Place of Adoption	Ha Noi, Viet Nam
Issued/Adopted by	Economic Ministers of ASEAN
Dispute settlement provisions	Refer to the 2009 ASEAN Comprehensive Investment Agreement “Article 27. Disputes Between or Among Member States: The ASEAN Protocol on Enhanced Dispute Settlement Mechanism signed in Vientiane, Lao PDR on 29 November 2004, as amended, shall apply to the settlement of disputes concerning the interpretation or application of this Agreement.” The 2009 ASEAN Comprehensive Investment Agreement is one of the ‘Covered Agreements’ pursuant to Article 1.1 of the 2019 ASEAN Protocol on Enhanced Dispute Settlement Mechanism read together with its Appendix 1. The 2019 Protocol will only apply with respect to new requests for consultations made on or after its entry into force (20 June 2022).
Depository	Secretary-General of ASEAN
Entry Into Force Status	In Force
Source	ASEAN Legal Instruments
Date of Entry into Force	10/01/2023
Entry into Force / Termination Provisions	“Article 5.1 Final Provisions: This Protocol shall form an integral part of the ACIA and shall enter into force after all Member States have notified the completion of their respective internal procedures for the entry into force of this Protocol to, or, where necessary, deposited instruments of ratification or acceptance with, the Secretary-General of ASEAN.”
Status
ASEAN States	(Source: ASEAN Legal Instruments as of 14/11/2025)
Brunei Darussalam	Signature 15/07/2020 Ratification 09/03/2021
Cambodia	Signature 15/07/2020 Ratification 10/01/2023
Indonesia	Signature 15/07/2020 Notification 08/02/2022
Lao PDR	Signature 15/07/2020 Acceptance 10/03/2022
Malaysia	Signature 15/07/2020 Notification 20/01/2021
Myanmar	Signature 15/07/2020 Ratification 28/09/2020
Philippines	Signature 15/07/2020 Ratification 28/12/2021
Singapore	Signature 15/07/2020 Notification 24/02/2021
Thailand	Signature 15/07/2020 Ratification 17/11/2020
Vietnam	Signature 15/07/2020 Notification 01/03/2021
Timor Leste
Related Instruments
This instrument amends/supersedes	2009 ASEAN Comprehensive Investment Agreement
Related Instruments	2014 Protocol to Amend the ASEAN Comprehensive Investment Agreement 2017 Second Protocol to Amend the ASEAN Comprehensive Investment Agreement 2017 Third Protocol to Amend the ASEAN Comprehensive Investment Agreement 2024 Fifth Protocol to Amend the ASEAN Comprehensive Investment Agreement 1987 Agreement Among the Governments of Brunei Darussalam, Republic of Indonesia, Malaysia, the Republic of the Philippines, the Republic of Singapore and the kingdom of Thailand for the Protection and Promotion of Investments 1996 Protocol to Amend the 1987 Agreement Among the Governments of Brunei Darussalam, Republic of Indonesia, Malaysia, the Republic of the Philippines, the Republic of Singapore and the Kingdom of Thailand for the Protection and Promotion of Investments 1998 Framework Agreement on the ASEAN Investment Area 2001 Protocol to Amend the Framework Agreement on the ASEAN Investment Area 2021 ASEAN Investment Facilitation Framework
External Links	ASEAN accessed on 14/11/2025
Last Updated on	14/11/2025