Cardano proposes an emergency mechanism to disable Leios in the event of a severe network outage. Developer Kevin Hammond proposes adding a mechanism allowing Cardano to quickly shut down the Leios scaling system in the event of a Level 1 or Level 2 critical network incident. According to the proposal, Cardano could suspend additional Leios transaction blocks by setting the parameter maxEndorserBlockTxsSize to 0, while maintaining the standard Praos block production mechanism. Activation of the emergency mechanism would waive certain requirements regarding notice periods and parameter change frequency. However, the decision would still require governance approval, including votes from delegated representatives, the Constitutional Committee, and stake pool operators. Restoring Leios would need to follow the standard approval process. The proposal has not yet been approved and requires testing on Preview and Preprod networks before deployment.