diff --git a/src/nemosis/data_fetch_methods.py b/src/nemosis/data_fetch_methods.py
index 0aeb6f9..5ed1c62 100644
--- a/src/nemosis/data_fetch_methods.py
+++ b/src/nemosis/data_fetch_methods.py
@@ -446,8 +446,7 @@ def _finalise_csv_data(data, table_name):
 static_downloader_map = {
     "VARIABLES_FCAS_4_SECOND": _downloader.download_csv,
     "ELEMENTS_FCAS_4_SECOND": _downloader.download_elements_file,
-    "Generators and Scheduled Loads": _downloader.download_xl,
-    "_downloader.download_xl": _downloader.download_xl,
+    "Generators and Scheduled Loads": _downloader.download_xlsx,
 }
 
 static_file_reader_map = {
diff --git a/src/nemosis/defaults.py b/src/nemosis/defaults.py
index 9c199b2..1027ae1 100644
--- a/src/nemosis/defaults.py
+++ b/src/nemosis/defaults.py
@@ -134,7 +134,6 @@
     "ELEMENTS_FCAS_4_SECOND": "https://www.nemweb.com.au/Reports/Current/Causer_Pays_Elements/",
     "VARIABLES_FCAS_4_SECOND": "https://aemo.com.au/-/media/files/electricity/nem/settlements_and_payments/settlements/auction-reports/archive/ancillary-services-market-causer-pays-variables-file.csv",
     "Generators and Scheduled Loads": "https://www.aemo.com.au/-/media/files/electricity/nem/Participant_Information/NEM-Registration-and-Exemption-List.xlsx",
-    "_downloader.download_xl": "https://www.aemo.com.au/-/media/files/electricity/nem/Participant_Information/NEM-Registration-and-Exemption-List.xlsx",
 }
 
 aemo_mms_url = "http://www.nemweb.com.au/Data_Archive/Wholesale_Electricity/MMSDM/{}/MMSDM_{}_{}/MMSDM_Historical_Data_SQLLoader/DATA/{}.zip"
diff --git a/src/nemosis/downloader.py b/src/nemosis/downloader.py
index dac391c..4137cc3 100644
--- a/src/nemosis/downloader.py
+++ b/src/nemosis/downloader.py
@@ -280,10 +280,10 @@ def download_elements_file(url, path_and_name):
         f.write(r.content)
 
 
-def download_xl(url, path_and_name):
+def download_xlsx(url, path_and_name):
     """
-    This function downloads a zipped csv using a url, extracts the csv and
-    saves it a specified location
+    Download an Excel (.xlsx) file from a URL and save it to the
+    specified path. Used for AEMO's NEM Registration and Exemption List.
     """
     r = requests.get(url, headers=USR_AGENT_HEADER)
     with open(path_and_name, "wb") as f: