diff --git a/src/bonsai/bonsai/tool/type.py b/src/bonsai/bonsai/tool/type.py
index f2617ad060..6a212afb0f 100644
--- a/src/bonsai/bonsai/tool/type.py
+++ b/src/bonsai/bonsai/tool/type.py
@@ -107,7 +107,15 @@ class Type(bonsai.core.tool.Type):
         # RelatingType / RelatedObjects classes; the one-to-one class pairing
         # is a buildingSMART implementer agreement, not file-validation.
         schema = occurrence.file.schema
-        return relating_type.is_a() in ifcopenshell.util.type.get_applicable_types(occurrence.is_a(), schema=schema)
+        if relating_type.is_a() in ifcopenshell.util.type.get_applicable_types(occurrence.is_a(), schema=schema):
+            return True
+        # The implementer agreement map has no entry for the abstract
+        # IfcTypeProduct, which Bonsai uses for annotation types. The schema
+        # defines IfcTypeProduct.ApplicableOccurrence for exactly this purpose,
+        # so honor it. occurrence.is_a() handles subtypes and unknown tokens.
+        if applicable_occurrence := getattr(relating_type, "ApplicableOccurrence", None):
+            return occurrence.is_a(applicable_occurrence.split("/", 1)[0])
+        return False
 
     @classmethod
     def has_material_usage(cls, element: ifcopenshell.entity_instance) -> bool: