You are using an outdated browser and your browsing experience will not be optimal. Please update to the latest version of Microsoft Edge, Google Chrome or Mozilla Firefox. Install Microsoft Edge

September 8, 2022

What Do Vietnam’s New Data Localization Requirements Mean for Domestic Enterprises?

While much attention has been paid to the data localization requirements for foreign enterprises under Vietnam’s 2018 Cybersecurity Law (“CSL”) and the recently issued Decree 53 guiding its implementation, the corresponding requirements for domestic enterprises are often overlooked, despite being potentially more troublesome.

Under Decree 53, “domestic enterprises” are defined to mean enterprises established or registered for establishment under Vietnamese law and having their head offices in Vietnam (Article 2.11), so this designation includes not only Vietnamese companies, but foreign-invested enterprises as well.

Background

Before analyzing the stipulations in Articles 26 and 27 of Decree 53 further guiding the data localization/storage requirements, it is worth restating the very problematic Article 26.3 of the CSL, which reads:

Domestic and foreign enterprises providing services on telecommunication networks or the internet or value-added services in cyberspace in Vietnam with activities of collecting, exploiting, analyzing, and/or* processing personal information data, data on the relationships of service users, or data generated by service users in Vietnam must store such data in Vietnam for the period prescribed by the government. Foreign enterprises mentioned in this clause must open branches or representative offices in Vietnam.

[* Note: The Vietnamese text simply uses a comma here, without specifying whether this should be “and” or “or,” leading to additional problems in interpretation.]

Because of this very broad and ambiguous wording, Article 26.3 of the CSL required further guidance from the government and remained unenforced for more than three years after the CSL took effect on January 1, 2019. Decree 53 guiding the implementation of the CSL was finally issued on August 15, 2022, and provides additional clarity on this matter. But does Decree 53 provide sufficient guidelines for implementation with regard to domestic enterprises?

Scope of Application

With regard to foreign enterprises, although there remains some ambiguity, Decree 53 provides clearer guidelines by specifying 10 types of services (the “regulated services”) that are subject to the data localization requirements, as well as the triggering conditions that lead to foreign enterprises being required to store regulated data and establish a branch or representative office in Vietnam. Decree 53 even covers cases where a foreign enterprise is unable to comply with a decision of the Ministry of Public Security (MPS) due to force majeure reasons. Please see our previous article for a detailed discussion.

With regard to domestic enterprises, Article 26.2 of Decree 53 simply sets out that “domestic enterprises must store the [regulated data as defined in Article 26.1] in Vietnam,” raising concerns as to what exactly is the true intention of the drafter.

This intention could be interpreted in several ways:

  1. The drafter wishes to cover all domestic enterprises (i.e., every company incorporated in and operating in Vietnam, regardless of industry or sector);
  2. The drafter wishes to cover all domestic enterprises “providing services on telecommunication networks or the internet or value-added services in cyberspace in Vietnam collecting, exploiting, analyzing, and/or processing personal information data, data on the relationships of service users, or data generated by service users in Vietnam,” as provided by Article 26.3 of the CSL, without any triggering conditions; or
  3. The drafter additionally wants to limit the services of domestic enterprises to the 10 regulated service types for foreign enterprises, with the same triggering conditions, to afford equal treatment between domestic enterprises and foreign enterprises. (Obviously, the scope of application in the first two interpretations would lead to differential treatment.)

Interpretation (1) is the broadest coverage and would significantly widen the scope of the CSL. In theory, according to the hierarchy of law and sub-laws in Vietnam, this is not legal. In practice, we have seen the authorities enforce stricter requirements found in subordinate legislation, instead of the broad requirements under the primary law. However, in our opinion, this intention is the least likely.

Interpretation (2) is the strictly “legal” interpretation, and the most likely intention of the drafter because Decree 53 was issued to implement certain articles of the CSL – Article 26.3 in this case. However, if interpretation (2) is the true intention of the drafter, the scope of coverage remains extremely broad and unclear, and may need further clarification from the MPS.

If the intention of the drafter is to treat domestic enterprises and foreign enterprises equally – i.e., interpretation (3) – then the drafting technique is flawed, because by not specifying the 10 regulated types of services and the triggering conditions for domestic enterprises, Article 26 of Decree 53 is not drafted in a way to support this intention.

Without further clarification from the MPS, interpretation (2) is the most likely intention; however, it could be argued that this clause thus covers all types of online services for domestic enterprises that collect, use, analyze, and/or process regulated data. Why would this be so?

Article 26.3 of the CSL specifies three types of services – “services on telecommunication networks”; “services on the internet”; and “value-added services in cyberspace” – without further explanation or definition, leaving it up to Decree 53 to define these services:

  • “Services on telecommunication networks means telecommunication services and telecommunication application services as prescribed by law” (Article 2.6 of Decree 53). Telecom law defines telecommunication application services to mean “services using telecom transmission lines or telecom networks to provide application services in the sectors of information technology, radio, television, commerce, finance, culture, information, medical health, education, and other sectors.” The notable inclusion of “other sectors” could be interpreted as a “catch-all” term, leading to the possibility that it could cover all sectors/services provided on telecom/internet networks. (The internet network is a type of telecom network.)
  • “Services on the internet means internet services and services providing content on the internet as prescribed by law” (Article 2.7 of Decree 53). The concept of “services providing content on the internet” is not defined and is very broad. Arguably, without definition, such services could be interpreted to include online news, online consulting, online advertising, video on demand, OTT television services, online games, social networks, etc., leading to an extremely broad scope of application.
  • Value-added services in cyberspace means value-added telecommunication services as prescribed by law” (Article 2.8 of Decree 53).

Therefore, with regard to domestic enterprises, it could be said that if there is no further guidance or clarification from the MPS, all online service providers which collect, use, analyze, and/or process regulated data are required to store the regulated data in Vietnam.

Form of Data Storage

Under Article 26.5 of Decree 53, the form of data storage in Vietnam is to be decided by the enterprises. However, what is sufficient to be considered as “storing data in Vietnam” is still very ambiguous.

As technology has evolved, cloud storage has become a very popular method for both domestic and foreign enterprises to store data. Is it sufficient to store data “in the cloud” if the cloud infrastructure is not located in Vietnam but is accessible via a computer in Vietnam? Or does the data need to be stored in a computer/server or cloud infrastructure that is physically located in Vietnam? Does the original regulated data have to be stored in Vietnam, or it sufficient to just store a copy? These practical concerns need further clarification from the MPS.

Duration of Data Storage

The duration for storage of regulated data of domestic enterprises is also unclear. Article 27.1 of Decree 53 stipulates that the data storage period specified in Article 26 of the decree starts from the time the enterprise receives a data storage request and lasts until the end of the request. The minimum storage period is 24 months.

It is unclear whether this data storage period is applicable to both domestic and foreign enterprises. While for foreign enterprises, Decree 53 clearly specifies the authority’s request to store data in Vietnam as a triggering condition, the decree is silent as to any conditions under which the authority will request domestic enterprises to store regulated data. As analyzed above, there might be no such condition to trigger a request for domestic enterprises. This means that, technically, Article 27.1 should only be applicable to foreign enterprises because it requires the enterprise to receive a data storage request from the authority. Therefore, it could be argued that the specified data storage duration is also only applicable to foreign enterprises, and the decree is silent regarding the data storage period for domestic enterprises. Accordingly, it is also unclear whether domestic enterprises have the obligation to continue retaining regulated data after their service users cease the use of their services.

Grace Period for Implementation

Decree 53 is silent on the grace period for domestic enterprises to store data in Vietnam. This could be interpreted to mean that unless there is further guidance from the MPS, domestic enterprises must comply with this requirement from the day Decree 53 takes effect, i.e., October 1, 2022.

Meanwhile, foreign enterprises only need to implement the data localization requirements when the triggering conditions are fulfilled and the MPS has issued a decision requesting them to do so. They also have a grace period of 12 months from the date of the decision to store data in Vietnam. Therefore, compared with foreign enterprises, domestic enterprises would need to be more proactive and act more quickly in storing regulated data in Vietnam.

How Should Domestic Enterprises Move Forward?

Although there has been a long wait for the promulgation of a decree guiding the implementation of the CSL, Decree 53 as issued still poses various ambiguities, uncertainties, and concerns that could prevent it from being implemented effectively. The question put forward is whether the MPS will issue a circular or other official clarification for further guidance of the implementation of Decree 53, especially clarification on the requirements applicable to domestic enterprises.

If there is no further clarification or guidance from the MPS, the strict legal interpretation of Decree 53 would be that all domestic enterprises “providing services on telecommunication networks or the internet or value-added services in cyberspace in Vietnam collecting, exploiting, analyzing, and/or processing personal information data, data on the relationships of service users, or data generated by service users in Vietnam” must store this regulated data in Vietnam. This means that all domestic online service providers which collect, use, analyze, or process regulated data should prepare themselves to comply with this requirement, starting from October 1, 2022.

In addition, if there is no further guidance, domestic enterprises would be well advised to store physically in Vietnam all regulated data they collect, use, analyze, or process. For example, they may store the regulated data in a file which is stored on a computer (their existing system) located in Vietnam, rather than in cloud storage that might be accessible via a computer in Vietnam, but hosted in another country.

RELATED INSIGHTS​ 

March 30, 2026
On March 24, 2026, the Trade Competition Commission of Thailand (TCCT) published its long-anticipated Guidelines on Multi-Sided Platforms and E-Commerce Businesses in the Government Gazette, following the conclusion of a public hearing conducted last year. The guidelines entered into force on March 25, 2026, and significantly expand the application of Thai competition law to digital platform ecosystems. These rules introduce targeted restrictions on platform conduct, such as price-ranking algorithms and tying and bunding, that leverages network effects, and will have far-reaching implications across Thailand’s digital economy—affecting not only platform operators but also platform participants, including sellers, logistics providers, advertisers, and payment service providers operating on or alongside such platforms. The guidelines clarify how existing prohibitions under the Trade Competition Act B.E. 2560 (2017) (TCA)—including abuse of market dominance, cartel conduct, and unfair trade practices—apply in the context of platform-based business models. While many provisions reflect earlier draft guidelines, the final version delivers more precise definitions and clearer enforcement parameters, increasing regulatory certainty while also raising compliance expectations. Applicability The guidelines introduce core definitions that determine their coverage: Multi-sided platform: A platform that acts as an intermediary connecting two or more groups of users, enabling them to have direct interaction in order to exchange or rely on services from one another. Examples include digital platforms for trading goods or services (e-commerce), as defined below. Digital platform for trading goods or services (e-commerce): A platform that acts as an intermediary connecting the distribution, purchase, sale, or exchange of goods or services. This includes operations carried out to facilitate transactions or interactions between business operators through an electronic transaction system, regardless of whether a service fee is charged. Operator of a digital platform business for trading goods or services: A provider of digital platform services for trading goods or services, as described
March 27, 2026
Thailand’s National Broadcasting and Telecommunications Commission (NBTC) has publicly indicated that it is preparing a new regulatory framework for data center operators that may introduce foreign-ownership restrictions. In particular, the NBTC is considering reclassifying data center operations from a type 1 telecommunications business license to a type 3 license. If implemented, this change would subject data center operators to a significantly more stringent regulatory regime, especially in relation to foreign ownership and control. The NBTC has indicated that it intends to propose a draft framework to the NBTC board. This would be followed by a public hearing process, with a view to implementing the new rules within 2026. Under the Telecommunications Business Act B.E. 2544 (2001), as amended, telecommunications businesses operating under type 3 licenses are subject to foreign ownership restrictions, including a requirement that less than 50% of the total issued shares be held by foreign shareholders. In addition, type 3 licensees are subject to foreign dominance restrictions, which prohibit arrangements that allow foreigners to dominate the business. These foreign dominance restrictions are broad in scope and may capture various forms of direct and indirect control or influence. This includes circumstances in which a foreign national is able to influence or control the formulation of policy, management, or business operations, or the appointment of directors or senior executives. At this stage, the exact scope of the proposed rules remains unclear. Businesses with existing or planned data center operations in Thailand should therefore monitor upcoming NBTC developments in this regard and prepare for the expected public hearing process.
March 27, 2026
Vietnam’s emerging governance framework for artificial intelligence (AI) is developing through a multi-layered structure comprising three components: Policy instruments setting national priorities for AI development; Regulatory framework governing development, provision, deployment and use of AI; and Technical standards and voluntary guidelines. Policy level. At policy level, the foundation for a strategic framework for AI development and governance was laid in 2021 by the National Strategy for Research, Development and Application of AI until 2030, aimed at strengthening the national AI ecosystem and positioning Vietnam as a regional AI innovation hub. Subsequently, resolution No.57-NQ/TW (2024) identified AI as a key driver of science, technology, innovation and national digital transformation. AI was also designated as a strategic technology under decision No.1131/QD-TTg (2025) listing priority technologies across sectors. Regulatory framework. At the legislative level, the new Law on Artificial Intelligence took effect on 1 March 2026, establishing the core regulatory framework governing development, provision, deployment and use of AI systems. Controlled testing for emerging AI technologies is implemented under the Law on Science, Technology and Innovation. The AI Law is expected to be further operationalised through implementing instruments, most notably a draft decree guiding the AI Law, and draft decision of the prime minister identifying high-risk AI systems (both published in February 2026). A decision establishing priority datasets for AI development is also anticipated. Compliance obligations may also arise under sectoral regulatory regimes, including data protection, cybersecurity, banking, consumer protection, e-commerce and intellectual property, particularly where AI systems are used in automated decision-making or data-driven services. Technical standards and non-binding guidelines. Vietnam’s AI governance framework is also supported by technical standards and voluntary guidelines. A key instrument is decision No.1290/QD-BKHCN (2024), providing guidelines for responsible research and development of AI systems, and represents Vietnam’s first national AI ethics code. The Ministry of Science and Technology
March 27, 2026
In response to the rapid advancement of artificial intelligence (AI) and evolving global digital trends, Thailand has undertaken significant efforts to establish a comprehensive national policy framework aimed at fostering an AI ecosystem. This framework seeks to promote the responsible development and deployment of AI technology to enhance Thailand’s economic competitiveness and improve quality of life, with targeted implementation by 2027. In furtherance of this national AI policy, regulatory authorities have initiated efforts to develop and refine the applicable legal framework, including the drafting of Thailand’s first unified AI legislation. Pending the composing and enactment of such comprehensive legislation, sector-specific regulators have proactively issued guidelines applicable to regulated entities within their respective jurisdictions, including financial institutions, banks, insurance companies, securities and derivatives business operators, and digital asset service providers. Concurrently, cross-sectoral regulatory bodies, notably the Personal Data Protection Committee (PDPC) and the National Cyber Security Agency (NCSA), have promulgated guidelines applicable to all business operators within their regulatory purview. While unified AI legislation has not been enacted, the design, development and use of AI in Thailand in various industries is still subject to existing sector-specific legislation. National AI policy The Thai cabinet approved the Thailand National AI Strategy and Action Plan (2022-2027) in July 2022, aiming to establish an AI development and application ecosystem by 2027. The strategy is built around five pillars: Preparing social, ethical, legal and regulatory readiness for AI; Developing national infrastructure; Increasing human capability and AI education; Driving AI technology and innovation; and Promoting AI adoption in public and private sectors. The above-mentioned national AI committee, under the National Digital Economy and Society Committee (NDESC), was established in August 2022, chaired by the prime minister. Comprehensive legislation Following the national AI strategy, the government has been developing comprehensive AI legislation to govern and promote AI