diff --git a/dip-0003.md b/dip-0003.md
index 6339342..5fe751b 100644
--- a/dip-0003.md
+++ b/dip-0003.md
@@ -222,7 +222,9 @@ A ProRegTx is invalid if any of these conditions are true:
   9. ipAddress is set and already used in the registered masternodes set
   10. operatorReward > 10000
   11. The inputsHash does not match the calculated hash
-  12. payloadSig is invalid
+  12. collateralOutpoint `hash` is null and payloadSig is not empty (zero size)
+  13. collateralOutpoint `hash` is not null and payloadSig is not a valid signature signed with the collateral key
+  14. collateralOutpoint `hash` is not null and the referenced collateral is not a P2PKH output
 
 Please note that while deploying DIP3, additional and temporary validation rules will apply. The details of these temporary rules will be described in the deployment plan.