diff --git a/pyproject.toml b/pyproject.toml
index 382d2dd..64e6098 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [project]
 name = 'camp-engine'
 version = '0.0.1'
-authors = [{ name = "Ken Moriarty", email = "kwatford@gmail.com" }]
+authors = [{ name = "Ken Moriarty", email = "ken@kmoriarty.dev" }]
 description = "Rules engines for the Camp app"
 readme = "README.md"
 license = { file = "LICENSE" }
@@ -19,7 +19,7 @@ force_single_line = true
 name = "camp-engine"
 version = "0.1.0"
 description = ""
-authors = ["Ken Moriarty <kwatford@gmail.com>"]
+authors = ["Ken Moriarty <ken@kmoriarty.dev>"]
 readme = "README.md"
 packages = [{ include = "camp", from = "src" }]
 
diff --git a/src/camp/engine/rules/tempest/controllers/feature_controller.py b/src/camp/engine/rules/tempest/controllers/feature_controller.py
index 26efefd..6087c46 100644
--- a/src/camp/engine/rules/tempest/controllers/feature_controller.py
+++ b/src/camp/engine/rules/tempest/controllers/feature_controller.py
@@ -588,7 +588,7 @@ def child_purchase_limit(self) -> int | None:
 
     @property
     def child_purchase_count(self) -> int:
-        return sum(c.purchased_ranks for c in self.children)
+        return sum(c.purchased_ranks for c in self.children if c.purchase_limit_applies)
 
     @property
     def child_purchase_remaining(self) -> int | None:
@@ -600,6 +600,10 @@ def child_purchase_remaining(self) -> int | None:
     def child_purchase_budget(self) -> int | None:
         return None
 
+    @property
+    def purchase_limit_applies(self) -> bool:
+        return self.definition.use_purchase_limit
+
     def can_increase(self, value: int = 1) -> Decision:
         if value <= 0:
             return _MUST_BE_POSITIVE
@@ -612,7 +616,11 @@ def can_increase(self, value: int = 1) -> Decision:
         if purchaseable <= 0:
             return Decision.NO
         # If the parent feature has purchase limits for children, enforce it.
-        if self.parent and self.parent.supports_child_purchases:
+        if (
+            self.purchase_limit_applies
+            and self.parent
+            and self.parent.supports_child_purchases
+        ):
             if (remaining := self.parent.child_purchase_remaining) is not None:
                 if remaining < value:
                     return Decision(
diff --git a/src/camp/engine/rules/tempest/defs.py b/src/camp/engine/rules/tempest/defs.py
index ed88b1c..f09bbbf 100644
--- a/src/camp/engine/rules/tempest/defs.py
+++ b/src/camp/engine/rules/tempest/defs.py
@@ -166,6 +166,7 @@ class BaseFeatureDef(base_models.BaseFeatureDef, PowerCard):
     choices: dict[str, ChoiceDef] | None = None
     subcard: PowerCard | list[PowerCard] | None = None
     child_purchase: ChildPurchaseDef | None = None
+    use_purchase_limit: bool = False
 
     def post_validate(self, ruleset: base_models.BaseRuleset) -> None:
         super().post_validate(ruleset)