diff --git a/power-curve-schema/examples/generic-117-3.json b/power-curve-schema/examples/generic-117-3.json
index 36b3111..1e33fdd 100644
--- a/power-curve-schema/examples/generic-117-3.json
+++ b/power-curve-schema/examples/generic-117-3.json
@@ -32,7 +32,7 @@
     "drive_type": "geared",
     "regulation_type": "pitch",
     "grid_frequencies": [50, 60],
-    "thermal_shutdown": {
+    "thermal_regulation": {
       "derating": [
         {
           "$comment": "Linear ramp down in low temperatures, altitude 2500",
diff --git a/power-curve-schema/examples/generic-274-20.json b/power-curve-schema/examples/generic-274-20.json
index db5cf3b..d750b59 100644
--- a/power-curve-schema/examples/generic-274-20.json
+++ b/power-curve-schema/examples/generic-274-20.json
@@ -32,7 +32,7 @@
     "drive_type": "geared",
     "regulation_type": "pitch",
     "grid_frequencies": [50, 60],
-    "thermal_shutdown": {
+    "thermal_regulation": {
       "derating": [
         {
           "$comment": "Linear ramp down in low temperatures, air density 1.3",
diff --git a/power-curve-schema/schema.json b/power-curve-schema/schema.json
index 9d83fb4..59a155c 100644
--- a/power-curve-schema/schema.json
+++ b/power-curve-schema/schema.json
@@ -118,9 +118,9 @@
       },
       "examples": [[50], [50, 60]]
     },
-    "thermal_shutdown": {
-      "title": "Thermal Shutdown and Deratings",
-      "description": "Define thermal shutdown characteristic",
+    "thermal_regulation": {
+      "title": "Thermal Regulation",
+      "description": "Define thermal shutdowns and derating characteristics",
       "type": "object",
       "properties": {
         "cold": {
@@ -375,7 +375,7 @@
       "uniqueItems": true
     }
   },
-  "required": ["document", "turbine", "design_bases", "power_curves"],
+  "required": ["document", "turbine", "power_curves"],
   "properties": {
     "document": {
       "type": "object",
@@ -442,7 +442,7 @@
         "drive_type",
         "regulation_type",
         "grid_frequencies",
-        "thermal_shutdown"
+        "thermal_regulation"
       ],
       "properties": {
         "manufacturer_name": {
@@ -527,8 +527,8 @@
         "rated_power": {
           "$ref": "#/$defs/rated_power"
         },
-        "thermal_shutdown": {
-          "$ref": "#/$defs/thermal_shutdown"
+        "thermal_regulation": {
+          "$ref": "#/$defs/thermal_regulation"
         },
         "cut_in_rpm": {
           "$ref": "#/$defs/cut_in_rpm"
@@ -1049,7 +1049,6 @@
               "label",
               "name",
               "description",
-              "design_bases",
               "cuts",
               "parameters",
               "power_is_coefficient",
@@ -1076,7 +1075,7 @@
               },
               "design_bases": {
                 "type": "array",
-                "description": "A list of the design basis labels relevant to this power curve",
+                "description": "A list of the design basis labels relevant to this mode. The 'design_bases' array is not required, so this field is also not required. However, if the 'design_bases' array is provided, this field should be populated in order to determine the applicable base(s).",
                 "items": {
                   "type": "string"
                 },
diff --git a/test/test_design_basis.py b/test/test_design_basis.py
index 2db105a..6d708a3 100644
--- a/test/test_design_basis.py
+++ b/test/test_design_basis.py
@@ -1,9 +1,10 @@
 # Turn off pylint warnings unavoidable with pytest
 # pylint: disable=redefined-outer-name, line-too-long, redefined-builtin, missing-module-docstring
 
+import pytest
 from jsonschema import validate
 from jsonschema.exceptions import ValidationError
-import pytest
+
 from .helpers import get_subschema
 
 
@@ -19,7 +20,5 @@ def test_generic_11_3_design_basis_1(subschema, generic_117_3):
 
 
 def test_missing_design_basis(subschema):
-    """Validation should fail if there is no design basis section"""
-    with pytest.raises(ValidationError) as e:
-        validate(instance={}, schema=subschema)
-    assert "'design_bases' is a required property" in str(e)
+    """Validation should pass if there is no design basis section"""
+    validate(instance={}, schema=subschema)