RunInstances is the API for launching instances so an SCP that limits use of it with conditions will only apply to launching new ones.
StopInstances are for stop/start actions.
Tag enforcement while creating a new resourceAccepted Answer
Enforcing tagging while creating resourceAccepted Answer
Does Tag Editor only retrieve resources that are or previously were tagged or also resources that were never tagged?asked 3 months ago
Enforcing Tag Policies on existing instancesAccepted Answerasked 3 years ago
Tagging resources attached to instancesAccepted Answerasked 6 years ago
S3 access policy Vs S3 bucket policies ... how they interact.Accepted Answerasked 2 years ago
Tag Policies: Account shows as compliant despite non-compliant resourcesAccepted Answerasked 3 years ago
SCP to enforce tags failsasked 2 months ago
Do Organizations Tag Policies support Principal referencesasked 6 months ago
Scp Tag enforcement is not working on Ec2.asked 4 months ago