diff --git a/docs/sections/user_guide/yaml/tags.rst b/docs/sections/user_guide/yaml/tags.rst
index a3a03c5a2..8acd99caa 100644
--- a/docs/sections/user_guide/yaml/tags.rst
+++ b/docs/sections/user_guide/yaml/tags.rst
@@ -23,6 +23,23 @@ Or explicit:
 
 Additionally, UW defines the following tags to support use cases not covered by standard tags:
 
+``!bool``
+^^^^^^^^^
+
+Converts the tagged node to a Python ``boolean`` object. For example, given ``input.yaml``:
+
+.. code-block:: yaml
+
+   flag1: True
+   flag2: !bool "{{ flag1 }}"
+
+.. code-block:: text
+
+   % uw config realize -i ../input.yaml --output-format yaml
+   flag1: True
+   flag2: True
+
+
 ``!datetime``
 ^^^^^^^^^^^^^
 
diff --git a/src/uwtools/config/support.py b/src/uwtools/config/support.py
index c11737a4f..f6337853c 100644
--- a/src/uwtools/config/support.py
+++ b/src/uwtools/config/support.py
@@ -108,7 +108,7 @@ class UWYAMLConvert(UWYAMLTag):
     method. See the pyyaml documentation for details.
     """
 
-    TAGS = ("!datetime", "!float", "!int")
+    TAGS = ("!bool", "!datetime", "!float", "!int")
 
     def convert(self) -> Union[datetime, float, int]:
         """
@@ -116,8 +116,13 @@ def convert(self) -> Union[datetime, float, int]:
 
         Will raise an exception if the value cannot be represented as the specified type.
         """
-        converters: dict[str, Union[Callable[[str], datetime], type[float], type[int]]] = dict(
-            zip(self.TAGS, [datetime.fromisoformat, float, int])
+        converters: dict[
+            str, Union[Callable[[str], bool], Callable[[str], datetime], type[float], type[int]]
+        ] = dict(
+            zip(
+                self.TAGS,
+                [lambda x: {"True": True, "False": False}[x], datetime.fromisoformat, float, int],
+            )
         )
         return converters[self.tag](self.value)
 
diff --git a/src/uwtools/drivers/fv3.py b/src/uwtools/drivers/fv3.py
index e19843aa9..d950680fb 100644
--- a/src/uwtools/drivers/fv3.py
+++ b/src/uwtools/drivers/fv3.py
@@ -3,15 +3,14 @@
 """
 
 from pathlib import Path
-from shutil import copy
 
 from iotaa import asset, task, tasks
 
+from uwtools.api.template import render
 from uwtools.config.formats.nml import NMLConfig
 from uwtools.config.formats.yaml import YAMLConfig
 from uwtools.drivers.driver import DriverCycleBased
 from uwtools.drivers.support import set_driver_docstring
-from uwtools.logging import log
 from uwtools.strings import STR
 from uwtools.utils.tasks import file, filecopy, symlink
 
@@ -34,7 +33,7 @@ def boundary_files(self):
         endhour = self.config["length"] + offset + 1
         interval = lbcs["interval_hours"]
         symlinks = {}
-        for n in [7] if self.config["domain"] == "global" else range(1, 7):
+        for n in [7] if self.config["domain"] == "regional" else range(1, 7):
             for boundary_hour in range(offset, endhour, interval):
                 target = Path(lbcs["path"].format(tile=n, forecast_hour=boundary_hour))
                 linkname = (
@@ -52,12 +51,16 @@ def diag_table(self):
         yield self.taskname(fn)
         path = self.rundir / fn
         yield asset(path, path.is_file)
-        yield None
-        if src := self.config.get(fn):
-            path.parent.mkdir(parents=True, exist_ok=True)
-            copy(src=src, dst=path)
-        else:
-            log.warning("No '%s' defined in config", fn)
+        template_file = Path(self.config[fn]["template_file"])
+        yield file(template_file)
+        render(
+            input_file=template_file,
+            output_file=path,
+            overrides={
+                **self.config[fn].get("template_values", {}),
+                "cycle": self.cycle,
+            },
+        )
 
     @task
     def field_table(self):
diff --git a/src/uwtools/resources/jsonschema/fv3.jsonschema b/src/uwtools/resources/jsonschema/fv3.jsonschema
index 49fbc6125..e20c7259b 100644
--- a/src/uwtools/resources/jsonschema/fv3.jsonschema
+++ b/src/uwtools/resources/jsonschema/fv3.jsonschema
@@ -20,7 +20,20 @@
       ],
       "properties": {
         "diag_table": {
-          "type": "string"
+          "additionalProperties": false,
+          "properties": {
+            "template_file": {
+              "type": "string"
+            },
+            "template_values": {
+              "minProperties": 1,
+              "type": "object"
+            }
+          },
+          "required": [
+            "template_file"
+          ],
+          "type": "object"
         },
         "domain": {
           "enum": [
@@ -142,6 +155,7 @@
         }
       },
       "required": [
+        "diag_table",
         "domain",
         "execution",
         "field_table",
diff --git a/src/uwtools/tests/config/formats/test_base.py b/src/uwtools/tests/config/formats/test_base.py
index 3e926eb13..491d43a08 100644
--- a/src/uwtools/tests/config/formats/test_base.py
+++ b/src/uwtools/tests/config/formats/test_base.py
@@ -211,9 +211,12 @@ def test_dereference(tmp_path):
   - !int '42'
   - !float '3.14'
   - !datetime '{{ D }}'
+  - !bool "False"
 f:
   f1: !int '42'
   f2: !float '3.14'
+  f3: True
+g: !bool '{{ f.f3 }}'
 D: 2024-10-10 00:19:00
 N: "22"
 
@@ -229,8 +232,9 @@ def test_dereference(tmp_path):
         "a": 44,
         "b": {"c": 33},
         "d": "{{ X }}",
-        "e": [42, 3.14, datetime.fromisoformat("2024-10-10 00:19:00")],
-        "f": {"f1": 42, "f2": 3.14},
+        "e": [42, 3.14, datetime.fromisoformat("2024-10-10 00:19:00"), False],
+        "f": {"f1": 42, "f2": 3.14, "f3": True},
+        "g": True,
         "D": datetime.fromisoformat("2024-10-10 00:19:00"),
         "N": "22",
     }
diff --git a/src/uwtools/tests/config/test_jinja2.py b/src/uwtools/tests/config/test_jinja2.py
index 6d430bf8b..407e49f9c 100644
--- a/src/uwtools/tests/config/test_jinja2.py
+++ b/src/uwtools/tests/config/test_jinja2.py
@@ -281,7 +281,7 @@ def test_unrendered(s, status):
     assert jinja2.unrendered(s) is status
 
 
-@mark.parametrize("tag", ["!datetime", "!float", "!int"])
+@mark.parametrize("tag", ["!bool", "!datetime", "!float", "!int"])
 def test__deref_convert_no(caplog, tag):
     log.setLevel(logging.DEBUG)
     loader = yaml.SafeLoader(os.devnull)
@@ -294,6 +294,7 @@ def test__deref_convert_no(caplog, tag):
 @mark.parametrize(
     "converted,tag,value",
     [
+        (True, "!bool", "True"),
         (datetime(2024, 9, 9, 0, 0), "!datetime", "2024-09-09 00:00:00"),
         (3.14, "!float", "3.14"),
         (42, "!int", "42"),
diff --git a/src/uwtools/tests/config/test_support.py b/src/uwtools/tests/config/test_support.py
index f17754697..c04b27f41 100644
--- a/src/uwtools/tests/config/test_support.py
+++ b/src/uwtools/tests/config/test_support.py
@@ -88,6 +88,16 @@ def loader(self):
     # demonstrate that those nodes' convert() methods return representations in type type specified
     # by the tag.
 
+    def test_bool_bad(self, loader):
+        ts = support.UWYAMLConvert(loader, yaml.ScalarNode(tag="!bool", value="foo"))
+        with raises(KeyError):
+            ts.convert()
+
+    @mark.parametrize("value, expected", [("False", False), ("True", True)])
+    def test_bool_values(self, expected, loader, value):
+        ts = support.UWYAMLConvert(loader, yaml.ScalarNode(tag="!bool", value=value))
+        assert ts.convert() == expected
+
     def test_datetime_no(self, loader):
         ts = support.UWYAMLConvert(loader, yaml.ScalarNode(tag="!datetime", value="foo"))
         with raises(ValueError):
diff --git a/src/uwtools/tests/drivers/test_fv3.py b/src/uwtools/tests/drivers/test_fv3.py
index 80939b56a..0f7f3ff5e 100644
--- a/src/uwtools/tests/drivers/test_fv3.py
+++ b/src/uwtools/tests/drivers/test_fv3.py
@@ -26,7 +26,10 @@
 def config(tmp_path):
     return {
         "fv3": {
-            "domain": "global",
+            "diag_table": {
+                "template_file": "/path/to/tmpl",
+            },
+            "domain": "regional",
             "execution": {
                 "batchargs": {
                     "walltime": "00:02:00",
@@ -116,18 +119,13 @@ def test_FV3_boundary_files(driverobj):
 def test_FV3_diag_table(driverobj):
     src = driverobj.rundir / "diag_table.in"
     src.touch()
-    driverobj._config["diag_table"] = src
+    driverobj._config["diag_table"] = {"template_file": src}
     dst = driverobj.rundir / "diag_table"
     assert not dst.is_file()
     driverobj.diag_table()
     assert dst.is_file()
 
 
-def test_FV3_diag_table_warn(caplog, driverobj):
-    driverobj.diag_table()
-    assert logged(caplog, "No 'diag_table' defined in config")
-
-
 def test_FV3_driver_name(driverobj):
     assert driverobj.driver_name() == FV3.driver_name() == "fv3"
 
diff --git a/src/uwtools/tests/test_schemas.py b/src/uwtools/tests/test_schemas.py
index 8265423c7..83e81a307 100644
--- a/src/uwtools/tests/test_schemas.py
+++ b/src/uwtools/tests/test_schemas.py
@@ -862,6 +862,7 @@ def test_schema_filter_topo():
 
 def test_schema_fv3():
     config = {
+        "diag_table": {"template_file": "/path"},
         "domain": "regional",
         "execution": {"executable": "fv3"},
         "field_table": {"base_file": "/path"},
@@ -887,7 +888,6 @@ def test_schema_fv3():
     assert not errors(
         {
             **config,
-            "diag_table": "/path",
             "files_to_copy": {"fn": "/path"},
             "files_to_link": {"fn": "/path"},
             "model_configure": {"base_file": "/path"},
@@ -903,9 +903,9 @@ def test_schema_fv3():
 def test_schema_fv3_diag_table(fv3_prop):
     errors = fv3_prop("diag_table")
     # String value is ok:
-    assert not errors("/path/to/file")
+    assert not errors({"template_file": "/path/to/file", "template_values": {"foo": "bar"}})
     # Anything else is not:
-    assert "42 is not of type 'string'\n" in errors(42)
+    assert "42 is not of type 'object'\n" in errors(42)
 
 
 def test_schema_fv3_domain(fv3_prop):