Enacted Cardano Protocol Parameter Change Proposals

Intersect’s Civics Committee and Technical Steering Committee propose to change the **minimum** Constitutional Committee size (`committeeMinSize`) from 7 to 5 in order to improve operational resilience while maintaining constitutional safeguards. The ratification of this Governance Action depends on the enactment of another live Parameter Change Governance Action (`gov_action1eqhnsdyf3exhp5mqt7sdjtl7xy69wqg8tvg854psns2jt72cra3qqrcnr8r`), which will change a number of Plutus cost model settings in preparation for the van Rossem hard fork.

Intersect's Parameter Committee proposes to update the Plutus V3 Cost Model via a Parameter Update governance action to enable the new Plutus primitives that will be available following the van Rossem hard fork (to Protocol Version 11), to enable all Plutus primitives in Plutus V1 and V2 as well as Plutus V3, and to change settings for some existing Plutus primitives. Note that the new primitives will not be enabled in Protocol version 10, but only following the enactment of the hard fork to Protocol Version 11. However, the changes for existing primitives will happen immediately on enactment of this governance action.

Intersect's Parameter Committee proposes the first of two Parameter Update governance actions. The following change is proposed together in this rationale, but will require two separate, linked governance actions as per guardrail MTEU-M-04. 1) increase Plutus script memory unit limits per transaction by 25% to allow greater flexibility for DApp developers. 2) increase Plutus script memory unit limits per block by 25% to remain consistent with the current block memory limits. No other protocol parameters or Plutus cost model setting will be changed.

We propose to update the Plutus V3 Cost Model via a Parameter Update governance action to enable the new Plutus primitives that will be available following the Chang#2 hard fork (to Protocol Version 10). Existing Plutus cost model settings will not be changed. Note that the primitives will not be enabled in Protocol version 9 (as enabled by the Chang hard fork).