What Is the Minimum Number of Signatures Usually Required to Validate a PoA Block?

The minimum number of signatures required to validate a Proof-of-Activity block is typically a supermajority of the randomly selected PoS validators, often set at two-thirds (66.7%) of the selected group. This supermajority threshold ensures a high degree of consensus and makes it difficult for a minority of stakers to hold up or corrupt the block finalization process.