diff --git a/Configuration/StandardSequences/python/Eras.py b/Configuration/StandardSequences/python/Eras.py
index 407ef67cc2b73..a84c495e6090b 100644
--- a/Configuration/StandardSequences/python/Eras.py
+++ b/Configuration/StandardSequences/python/Eras.py
@@ -23,7 +23,13 @@ def __init__(self):
         # activated automatically if the "--fast" command is used.
         self.fastSim = cms.Modifier()
         
+        #
         # These are the eras that the user should specify
+        #
+        # Run1 currently does nothing. It's useful to use as a no-operation era commands when scripting,
+        # but also retains the flexibility to add Run1 specific commands at a later date.
+        self.Run1 = cms.Modifier()
+        # The various Run2 scenarios for 2015 startup.
         self.Run2_25ns = cms.ModifierChain( self.run2_common, self.run2_25ns_specific, self.stage1L1Trigger )
         self.Run2_50ns = cms.ModifierChain( self.run2_common, self.run2_50ns_specific, self.stage1L1Trigger )
         self.Run2_HI = cms.ModifierChain( self.run2_common, self.run2_HI_specific, self.stage1L1Trigger )