diff --git a/lib_afc_mosaic/universe_map_file.py b/lib_afc_mosaic/universe_map_file.py
index caead5b..3bbe415 100644
--- a/lib_afc_mosaic/universe_map_file.py
+++ b/lib_afc_mosaic/universe_map_file.py
@@ -124,6 +124,7 @@ class AFCMUniverseMapFile:
         self.mosaic_head = map_dict.get('mosaic', {})
         self.metadata = map_dict.get('metadata', {})
         self.mosaic_file_list = map_dict.get('files', {})
+        self.mosaic_postprocess = map_dict.get('postprocess', {})
 
         return None
 
@@ -138,7 +139,8 @@ class AFCMUniverseMapFile:
 
         output_object = json.dumps({"mosaic": self.mosaic_head,
                                     "metadata": self.metadata,
-                                    "files": self.mosaic_file_list}, indent=4)
+                                    "files": self.mosaic_file_list,
+                                    "postprocess": self.mosaic_postprocess}, indent=4)
 
         with open(filename, 'w', encoding="UTF-8") as outfile:
             outfile.write(output_object)
@@ -206,11 +208,7 @@ class AFCMUniverseMapFile:
             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[:]
+        self.postprocessing()
 
         # Run final steps
         self.write_final_file()
@@ -220,21 +218,21 @@ class AFCMUniverseMapFile:
     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
+                }
+            }
         """
 
-        # structure in the map file
-        # "postprocess": {
-        #     "range": {
-        #         "start": 0,
-        #         "end": 10000
-        #     }
-        # }
+        # need to figure out how to handle rules in defined order
 
-
-        # get list of keys from "postprocess"
-        # if "range" exists,
-        #     get "start" and "end" keys
-        #     copy the range from cleaned_import_rows into final_rows
+        # if no range is defined, this copies the entire list from self.cleaned_import_rows
+        range = self.mosaic_postprocess.get('range', {})
+        self.final_rows = self.cleaned_import_rows[range.get('start', None):range.get('end', None)]
 
         return
 
diff --git a/setup.py b/setup.py
index a33397c..9d4379b 100644
--- a/setup.py
+++ b/setup.py
@@ -9,7 +9,7 @@ with open('README.md', 'r') as f:
 
 setup(
     name='lib_afc_mosaic',
-    version='0.1.8',
+    version='0.1.9',
     author='',
     author_email='',
     description='',