ASM / DoS Trigger Irule 11.5.4

Code level 11.5.4 Concerning ASM policies and DoS Profiles. Let me ask about Dos Profiles first. If you select the check box to "Trigger Irule" and let's say you create this irule:

when IN_DOSL7_ATTACK { log local0. "Attacker IP: $DOSL7_ATTACKER_IP" log local0. "Mitigation: $DOSL7_MITIGATION" }

This may be a stupid question but where do you put this irule? do you put this irule on the Virtual Server that you have applied the Dos Profile?