Summary The proposed Cloud and AI Development Act (CADA) serves as the legislative engine for the EU Open Source Strategy, transforming high-level policy goals into binding regulatory requirements for the public sector. As proposed, Article 41 of CADA would legally obligate Union entities and Member States to encourage the use of open standards and open-source components when building cloud and AI ecosystems. The Explanatory Memorandum explicitly identifies open source as a "lever to boost technological sovereignty," aligning with the Strategy's aim to promote open European alternatives across the entire technology stack. This shifts the paradigm from voluntary encouragement to a structured framework where open source is a primary consideration for security, interoperability, and autonomy, supported by new mechanisms like the EU Open Source Solutions Catalogue and a network of Open Source Programme Offices.

Detail

The relationship between the proposed Cloud and AI Development Act (CADA) and the EU Open Source Strategy is not merely complementary; it is foundational. CADA is designed to be the specific legislative vehicle that operationalises the strategic ambitions of the EU Open Source Strategy, particularly within the critical domains of cloud computing and artificial intelligence. While the Strategy provides the political direction and the "why," CADA provides the legal "how," embedding open source principles directly into the procurement and deployment of critical digital infrastructure.

From Strategy to Legislation: The Sovereignty Lever

The connection between the two instruments is explicitly defined in the CADA Explanatory Memorandum. The Commission states that the proposal "places a specific focus on open source as a lever to boost technological sovereignty, in line with the EU Open Source Strategy which aims to promote open European alternatives across the European technology stack."

This phrasing is critical. It confirms that CADA is not an isolated measure but a direct implementation mechanism for the Commission's broader digital sovereignty agenda. The EU Open Source Strategy advocates for transparency, security, and reduced vendor lock-in as general principles. CADA translates these principles into actionable obligations for the public sector. By legally mandating that open source be a core consideration in the construction of the "cloud and AI ecosystem or stack," CADA ensures that the Strategy's goals are not just aspirational but are integrated into the daily operations of Union entities and Member States.

Article 41: The Operational Core

The primary provision linking CADA to the EU Open Source Strategy is Article 41, titled "Promoting open source solutions and open source first." This article establishes the operational framework for the "open source first" principle within the public sector.

Article 41 stipulates:

"The Union and Member States shall take the necessary measures to encourage Union entities and public sector bodies to use and facilitate the reuse of open standards and components released under an open source licence when building their cloud and AI ecosystem or stack, taking into account functionalities, including security, total cost, and other relevant, duly justified objective criteria."

This provision operationalises the EU Open Source Strategy in three distinct and powerful ways:

  1. Mandating Active Measures: The article requires the Union and Member States to take "necessary measures" to encourage the use of open source. This moves beyond optional guidance or soft policy, requiring public authorities to actively integrate open source considerations into their strategic planning, procurement processes, and IT governance for cloud and AI systems. It creates a duty to act, ensuring that open source is not an afterthought but a foundational element of digital strategy.
  2. Holistic Evaluation Criteria: The article explicitly lists "security, total cost, and other relevant, duly justified objective criteria" as factors to consider. This aligns perfectly with the EU Open Source Strategy's emphasis on security and transparency over mere cost reduction. By mandating that security be a primary evaluation criterion alongside cost, CADA ensures that open source is chosen not just for economic reasons, but for its ability to provide auditability, reduce single-vendor dependency, and enhance overall system resilience. It prevents the "lowest bidder" trap by legally requiring a balanced assessment of security and functionality.
  3. Focus on the Full "Stack": The reference to building the "cloud and AI ecosystem or stack" is significant. It implies that open source principles should apply not just to end-user applications, but to the underlying infrastructure, middleware, data layers, and AI models themselves. This supports the Strategy's goal of promoting open European alternatives across the entire technology stack, from hardware-aware software to high-level AI interfaces, ensuring that sovereignty is maintained at every layer of the digital value chain.

Supporting Mechanisms: Catalogues, Reuse, and Collaboration

To support the implementation of Article 41 and ensure the EU Open Source Strategy's goals of collaboration and reuse are met, CADA introduces structural mechanisms that create a cohesive ecosystem.

  • The EU Open Source Solutions Catalogue (Article 43): The Explanatory Memorandum notes that software is often made available in disparate repositories, hampering discoverability and reuse. Article 43 requires Union entities and public sector bodies that voluntarily share software to do so through catalogues connected to a central EU Open Source Solutions Catalogue. This directly supports the Strategy's objective of maximizing the value of public expenditure by facilitating the reuse of existing solutions, thereby reducing duplication, fostering innovation, and creating a "one-stop-shop" for open European alternatives.
  • The Network of Open Source Programme Offices (Article 44): Article 44 creates a Network of Open Source Programme Offices (OSPO Network). This network is designed to facilitate cooperation between OSPOs established by Member States and Union entities. The OSPO Network's tasks include facilitating the exchange of best practices, discussing technical and legal challenges (such as licensing, security, and maintenance), and promoting the sharing of open-source software. This institutionalizes the collaborative spirit of the EU Open Source Strategy, creating a permanent structure for knowledge sharing and capacity building across the EU, ensuring that public bodies have the expertise to implement open source effectively.
  • Mandatory Reuse Channels (Article 42): Article 42 reinforces this by requiring that when Union entities or public sector bodies make software available for reuse under an open-source licence, they must do so using a catalogue connected to the EU OSS Catalogue. This ensures that the "open source first" principle is not just about selection, but also about the circulation and reuse of public digital assets.

Strategic Alignment: Sovereignty, Security, and Autonomy

The CADA proposal consistently frames open source as a critical component of technological sovereignty. The Explanatory Memorandum highlights that open source "enables auditability, fosters collaboration and reuse and reduces dependency on a single vendor, thereby limiting the risk of vendor lock-in."

By legally embedding these principles through Article 41 and its supporting articles, CADA ensures that the EU's public sector can leverage open source to maintain control over its digital infrastructure. This is particularly relevant in the context of cloud and AI, where reliance on proprietary, black-box solutions from non-EU providers poses significant risks to data sovereignty and operational autonomy. Open source provides the transparency necessary to verify that no hidden backdoors exist and the flexibility to adapt to changing security threats without being held hostage by a single vendor's roadmap.

What this means for you

For public-sector procurement officers, IT strategists, and policy makers, the proposed CADA framework signals a fundamental shift in how open source solutions must be evaluated, procured, and integrated.

  • Procurement Criteria Overhaul: You will need to ensure that your procurement procedures for cloud and AI services explicitly include open source considerations. Under the spirit of Article 41, you must evaluate tenders based on security, total cost of ownership, and functionality, with a clear preference for solutions that utilize open standards and open-source components. This may involve adjusting your technical specifications to allow for, or even prioritize, open-source alternatives, ensuring that "security" is weighed as heavily as "cost."
  • Reuse and Contribution Obligations: If your organization develops custom software for cloud or AI purposes, you should plan to make it available for reuse. Article 42 requires that any software made available for reuse under an open-source licence be listed in a catalogue connected to the EU OSS Catalogue (Article 43). This means you will need to integrate with this central repository to ensure discoverability and compliance, turning your internal tools into public assets.
  • Capacity Building and Networking: Engaging with the OSPO Network (Article 44) will become increasingly important. This network will serve as a hub for sharing best practices on licensing, security, and maintenance. Procurement officers should look to this network for guidance on navigating the complexities of open-source procurement and for templates or recommendations that can streamline your processes.
  • Strategic Planning Integration: Your national or organizational cloud and AI strategies (required under Article 7) should explicitly address how you intend to meet the "open source first" encouragement measures. This involves demonstrating how open source contributes to your overall goals of security, cost-efficiency, and technological autonomy, ensuring alignment with the broader EU Open Source Strategy.

Common misconceptions

Misconception: CADA mandates the exclusive use of open source.

  • Reality: Article 41 uses the language of "encourage" and "facilitate," not "mandate exclusive use." It requires public bodies to take into account functionalities, security, and total cost. Proprietary solutions remain permissible if they are justified by objective criteria (e.g., if a proprietary solution offers superior security or functionality that cannot be met by open source). The goal is to ensure open source is a primary consideration, not the only option.

Misconception: Open source is only about saving money.

  • Reality: While cost is a factor, Article 41 explicitly lists "security" and "functionalities" as key criteria. The CADA proposal frames open source as a tool for technological sovereignty and risk reduction (e.g., avoiding vendor lock-in, ensuring auditability), not just a cost-cutting measure. Security auditability and control over the technology stack are paramount.

Misconception: The EU Open Source Strategy is already fully implemented.

  • Reality: The Strategy sets the direction, but CADA provides the specific legal framework for the cloud and AI sector. Without CADA's provisions like Article 41, 43, and 44, the Strategy's goals would lack a binding mechanism for enforcement in the context of critical digital infrastructure. CADA bridges the gap between strategic intent and operational reality.

Related

This is general information about a draft EU regulation, not legal advice.