diff --git a/aman/sys/Worker.py b/aman/sys/Worker.py
index 3779dbe..8c947dd 100644
--- a/aman/sys/Worker.py
+++ b/aman/sys/Worker.py
@@ -121,7 +121,7 @@ class Worker(Thread):
                 print('Relevant inbounds: ' + str(len(relevantInbounds)))
 
                 # configure the ACO run
-                acoConfig = Configuration(self.sequencingConfiguration, 5 * len(relevantInbounds), 5 * len(relevantInbounds))
+                acoConfig = Configuration(earliestArrivalTime, self.sequencingConfiguration, 5 * len(relevantInbounds), 5 * len(relevantInbounds))
                 if 0 != len(preceedingInbounds):
                     acoConfig.PreceedingInbounds = preceedingInbounds
                 acoConfig.Inbounds = relevantInbounds
diff --git a/aman/sys/aco/Configuration.py b/aman/sys/aco/Configuration.py
index 2087be5..82924b5 100644
--- a/aman/sys/aco/Configuration.py
+++ b/aman/sys/aco/Configuration.py
@@ -1,13 +1,16 @@
 #!/usr/bin/env python
 
+from datetime import datetime
+
 from aman.config.AirportSequencing import AirportSequencing
 
 class Configuration:
-    def __init__(self, runwayInfo : AirportSequencing, antCount : int, explorationCount : int):
+    def __init__(self, earliestArrivalTime : datetime, runwayInfo : AirportSequencing, antCount : int, explorationCount : int):
         # the AMAN specific information
         self.RunwayConstraints = runwayInfo
         self.PreceedingInbounds = None
         self.Inbounds = None
+        self.EarliestArrivalTime = earliestArrivalTime
 
         # the ACO specific information
         self.AntCount = antCount