Loss or injury
A breach under the act is one that causes, or that the entity reasonably believes has caused or will cause, loss or injury to any resident of the Commonwealth. When that is the case, notice goes to any resident whose unencrypted and unredacted personal information was or is reasonably believed to have been accessed and acquired by an unauthorized person.
Both halves matter: the data must have been accessed and acquired, and the incident must carry the prospect of loss or injury.