diff --git a/data_collection/gazette/spiders/base/diof.py b/data_collection/gazette/spiders/base/diof.py
index f2f753155..2abacde37 100644
--- a/data_collection/gazette/spiders/base/diof.py
+++ b/data_collection/gazette/spiders/base/diof.py
@@ -15,7 +15,7 @@
 
 class BaseDiofSpider(BaseGazetteSpider):
     """
-    Base Spider for all cases with use DIOF/SAI service
+    Base Spider for all cases that use DIOF/SAI service
 
     Attributes
     ----------
@@ -27,7 +27,7 @@ class BaseDiofSpider(BaseGazetteSpider):
             - https://sai.io.org.br/ba/abare/site/diariooficial
     """
 
-    custom_settings = {"DOWNLOAD_DELAY": 1}
+    custom_settings = {"DOWNLOAD_DELAY": 0.5}
     handle_httpstatus_list = [404]
 
     api_url = "https://diof.io.org.br/api"
@@ -85,6 +85,13 @@ def interval_request(self, response):
             )
 
     def parse_items(self, response):
+        """
+        The SAI service appears to be migrating its backend to consume a DIOF API,
+        but some gazettes are only collectible through the old URL. So, this method
+        checks whether the document exists in the new URL and, if not, collects
+        it using the old URL.
+        """
+
         for gazette_date in json.loads(response.text):
             for gazette in gazette_date["elements"]:
                 date = gazette["dat_envio"]