diff --git a/lib_afc_mosaic/universe_map_file.py b/lib_afc_mosaic/universe_map_file.py
index 69c4f7d..caead5b 100644
--- a/lib_afc_mosaic/universe_map_file.py
+++ b/lib_afc_mosaic/universe_map_file.py
@@ -33,6 +33,7 @@ class AFCMUniverseMapFile:
         self.mosaic_head = {}
         self.metadata = {}
         self.mosaic_file_list = {}
+        self.mosaic_postprocess = {}
 
         self.files = []
 
@@ -41,9 +42,10 @@ class AFCMUniverseMapFile:
         self.optout_s3_connection = None
         self.optout_s3_bucket = None
 
-        self.final_rows = []
+        self.cleaned_import_rows = []
         self.removed_row_count = 0
         self.processed_row_count = 0
+        self.final_rows = []
 
         # Watch for duplicates across files
         self.running_phone_numbers = {}
@@ -105,6 +107,9 @@ class AFCMUniverseMapFile:
             if 'files' in data:
                 self.mosaic_file_list = data['files']
 
+            if 'postprocess' in data:
+                self.mosaic_postprocess = data['postprocess']
+
         return data
 
 
@@ -199,11 +204,41 @@ class AFCMUniverseMapFile:
         # Loop the files from the map
         for ufilename in self.mosaic_file_list:
             self.process_file(ufilename)
+
+        # Perform post-processing
+        if len(self.mosaic_postprocess) is not 0:
+            self.postprocessing()
+        else:
+            # copy self.cleaned_import_rows list to self.final_rows list
+            self.final_rows = self.cleaned_import_rows[:]
+
         # Run final steps
         self.write_final_file()
         self.write_stats_file()
 
 
+    def postprocessing(self):
+        """
+        postprocessing Performs actions for any postprocessing rules defined in the voterset map file
+        """
+
+        # structure in the map file
+        # "postprocess": {
+        #     "range": {
+        #         "start": 0,
+        #         "end": 10000
+        #     }
+        # }
+
+
+        # get list of keys from "postprocess"
+        # if "range" exists,
+        #     get "start" and "end" keys
+        #     copy the range from cleaned_import_rows into final_rows
+
+        return
+
+
     def process_file(self, voterset_filename):
         """
         process_file Process the file of the VoterSet
@@ -353,7 +388,7 @@ class AFCMUniverseMapFile:
             new_row['Cell_Phone'] = formatted_number
 
             amplify_rows.append(new_row)
-            self.final_rows.append(new_row)
+            self.cleaned_import_rows.append(new_row)
             self.running_phone_numbers[formatted_number] = True
 
         processing_time = time.time() - processing_time_start