diff --git a/docs/source/change-log.rst b/docs/source/change-log.rst
index 15da125..5938c82 100644
--- a/docs/source/change-log.rst
+++ b/docs/source/change-log.rst
@@ -14,7 +14,7 @@ This project adheres to `Semantic Versioning`_.
 -----
 
 * The IPUMS API now supports geographic extent selection for NHGIS time series tables.
-  Accordingly, a `geographic_instances` attribute has been added to the 
+  Accordingly, a ``geographic_instances`` attribute has been added to the 
   :py:class:`~ipumspy.api.metadata.TimeSeriesTableMetadata` class to store retrieved
   geographic extent metadata for a given time series table.
 
diff --git a/docs/source/ipums_api/ipums_api_aggregate/index.rst b/docs/source/ipums_api/ipums_api_aggregate/index.rst
index 8f82409..7cd06c8 100644
--- a/docs/source/ipums_api/ipums_api_aggregate/index.rst
+++ b/docs/source/ipums_api/ipums_api_aggregate/index.rst
@@ -232,7 +232,8 @@ a trailing 0):
 .. tip::
    You can see available extent selection API codes, if any, in the ``geographic_instances`` attribute of
    a submitted :class:`DatasetMetadata <ipumspy.api.metadata.DatasetMetadata>` or 
-   :class:`TimeSeriesTableMetadata <ipumspy.api.metadata.TimeSeriesTableMetadata>` object.
+   :class:`TimeSeriesTableMetadata <ipumspy.api.metadata.TimeSeriesTableMetadata>` object. The 
+   ``geog_levels`` attribute indicates whether a given geographic level supports extent selection.
 
 Note that the selected extents are applied to all datasets and time series tables in an extract. 
 It is not possible to request different extents for different data sources in a single extract.
diff --git a/src/ipumspy/api/extract.py b/src/ipumspy/api/extract.py
index e7cafdd..fb1eca9 100644
--- a/src/ipumspy/api/extract.py
+++ b/src/ipumspy/api/extract.py
@@ -713,8 +713,7 @@ def __init__(
             description: short description of your extract
             data_format: desired format of the extract data file. One of ``"csv_no_header"``, ``"csv_header"``, or ``"fixed_width"``.
             geographic_extents: Geographic extents to use for all ``datasets`` and ``time_series_tables`` in the extract definition (for instance, to
-                                to obtain data within a particular state). Note that geographic extent selection is only supported for geographies
-                                that nest within states.
+                                to obtain data within a particular state).
             tst_layout: desired data layout for all  ``time_series_tables`` in the extract definition.
                         One of ``"time_by_column_layout"`` (default), ``"time_by_row_layout"``, or ``"time_by_file_layout"``.
             breakdown_and_data_type_layout: desired layout of any ``datasets`` that have multiple data types or breakdown values. Either