Cardano Chang Hard Fork Explained: Governance Upgrade Guide

Why the Chang Hard Fork Changed Cardano Governance

The Cardano Chang hard fork is the upgrade that turned ADA holders into actual decision-makers. Before this update, most protocol changes on Cardano moved through founding entities and core developers. That changed on September 1, 2024, when the network activated the first stage of on-chain governance.

This guide breaks down what the Chang hard fork actually did, why Cardano needed it, and how consensus power now flows between ADA holders, DReps, the Constitutional Committee, and stake pool operators. If you hold ADA or track Cardano development, this upgrade shapes almost everything that happens next on the network.

What Is the Cardano Chang Hard Fork?

Chang is the upgrade that moved Cardano's ledger into the Conway era. It introduced the on-chain governance framework defined in CIP-1694, the proposal that describes how Cardano should be run once its founding entities step back from day-to-day decisions.

The upgrade takes its name from cryptographer David Chaum. It arrived in two parts, commonly called Chang #1 and Chang #2, with the second stage later renamed Plomin. Together, they mark Cardano's entry into what the roadmap calls the Voltaire phase, the stage built around decentralized governance participation.

Why Did Cardano Need the Chang Upgrade?

Cardano's earlier governance model relied heavily on Input Output Global, the Cardano Foundation, and Emurgo. That setup worked while the network was still building core infrastructure. It did not give ordinary ADA holders a direct say in protocol decisions.

The project's stated goal, going back to its original roadmap, was always to hand voting to the community once the network matured. Chang is the technical step that makes that possible. It replaces informal coordination with a voting process token holders can join directly or through delegation.

How Does Cardano Chang Governance Work?

Cardano's governance now runs through what the project calls a liquid democracy model. ADA holders can vote on proposals themselves, or delegate that voting power to a representative they trust.

Governance actions cover things like protocol parameter changes, treasury withdrawals, hard fork initiation, and constitutional amendments. Each action type follows its own ratification rules, requiring approval from some combination of DReps, the Constitutional Committee, and stake pool operators before it goes live on the network.

Key Features Introduced by the Chang Hard Fork

Chang bundled several changes into one ledger-level upgrade:

• On-chain voting mechanisms defined by CIP-1694

• The DRep framework for delegated voting

• A Constitutional Committee to check proposals against the network's constitution

• A formal voting role for stake pool operators

• PlutusV3, which added new cryptographic primitives for smart contracts

• Support for more advanced governance actions, including DAO-style consensus

What Are DReps in Cardano Governance?

DRep stands for delegated representative. It is a role any eligible ADA holder can register for, after posting a refundable deposit, so other holders can delegate their consensus power to them.

Not every ADA holder wants to research and vote on every proposal. DReps solve that by letting people delegate to someone whose judgment they trust, similar to how stake delegation already works for block production. ADA holders can also vote directly instead of delegating, since staking and delegation stayed separate from this new voting layer.

What Is the Constitutional Committee?

The Constitutional Committee checks whether a governance action is constitutional before it can pass. During the bootstrapping phase, an interim committee filled this role while the community finalized a permanent constitution.

The committee does not set policy on its own. Its job is narrower: confirm that a proposal fits within the agreed rules. DReps and SPOs still handle the actual approval or rejection of most governance actions.

What Role Do Cardano Stake Pool Operators Play?

Stake pool operators, or SPOs, kept an active voting role after Chang. During the bootstrap period, SPOs and the interim committee were the only bodies that could vote on parameter changes and hard fork initiation.

SPOs also carry a practical responsibility. Every hard fork needs enough of the network's stake pools running upgraded node software before the change can activate, which makes their participation necessary for any future protocol update, governance related or not.

Chang Hard Fork vs Previous Cardano Governance

The table shows a shift in structure, not just new features. Decisions that once needed coordination between a handful of organizations now go through defined, on-chain voting bodies.

Chang Upgrade and CIP-1694 Explained

CIP-1694 is the Cardano Improvement Proposal that laid out this entire voting system. It had been discussed and revised by the community since early 2023, and became one of the most debated proposals in Cardano's history.

The proposal defines the roles of DReps, the Constitutional Committee, and SPOs, along with the ratification thresholds each type of governance action needs. Chang is simply the ledger upgrade that put CIP-1694's design into practice, as laid out in Cardano's evolution documentation.

Chang Hard Fork Phases Explained

Chang #1: Bootstrapping

Chang #1 activated on September 1, 2024, at epoch 507. It set up the interim Constitutional Committee, opened DRep registration, and enabled limited voting actions such as parameter changes and hard fork initiation. During this phase, SPOs and the interim committee held most of the voting power.

Plomin: Full Governance Activation

The second stage, renamed Plomin after community organizer Matthew Plomin, activated on January 29, 2025, at epoch 537. According to the official Cardano documentation, Plomin turned on the remaining CIP-1694 actions, fully activated the DRep role, and opened the door to community-approved treasury withdrawals.

What Changed for ADA Holders After Chang?

ADA holders gained a direct channel into protocol decisions that did not exist before. They can register as a DRep, delegate to one, or hold their voting power without delegating at all.

Owning ADA and participating in governance are still two separate actions. A holder who never delegates or votes keeps their tokens but has no say in outcomes, since Cardano's utility in governance depends on active participation, not just token ownership.

How Cardano Governance Works After Chang

A simplified flow of a governance action looks like this:

ADA Holder → Direct Vote or DRep Delegation → Proposal Submitted → Voting by DReps, SPOs, and Constitutional Committee → Ratification → On-Chain Execution

Different action types need different combinations of approval, so not every proposal moves through the same path.

Benefits and Challenges of Chang

Benefits

• Wider participation for ADA holders in protocol direction

• Transparent, on-chain record of voting decisions

• Reduced reliance on a small set of founding organizations

• A formal path for treasury funds to reach community-approved projects

Challenges

• Voter turnout among ADA holders remains a concern

• The multi-body voting structure adds complexity for newcomers

• DRep accountability is still developing as a practice

• Coordinating SPOs, DReps, and the committee takes time on contested proposals

Why the Chang Hard Fork Matters for Cardano's Future

Chang is the foundation for every voting decision Cardano makes going forward, including treasury spending, constitutional changes, and future protocol upgrades. It also ties directly into other technical work happening on the network, including scaling efforts like Hydra.

Whether this voting model holds up under real disagreement, not just routine proposals, remains an open question the community will answer over time. How well it performs alongside Cardano's transaction design, including its eUTXO model, will also shape how developers build on the network.

Conclusion

The Cardano Chang hard fork replaced an informal governance setup with a structured, on-chain system built around CIP-1694. Chang #1 laid the groundwork in September 2024, and Plomin completed the framework in January 2025 by activating full DRep voting and treasury withdrawals.

What stands out is the shift from founder-led decisions to a tripartite system involving ADA holders, DReps, SPOs, and the Constitutional Committee. What remains uncertain is voter participation over the long run. Readers tracking ADA should watch DRep turnout and upcoming voting actions to see how this model performs in practice.

Disclaimer: This article is for informational purposes only and does not count as financial advice. Cryptocurrency investments carry high risk, and readers should research independently before making any decisions. Past network developments do not guarantee future outcomes.