diff --git a/guidelines/groups/layout/structure.md b/guidelines/groups/layout/structure.md
index d3d88c98..ef01f27d 100644
--- a/guidelines/groups/layout/structure.md
+++ b/guidelines/groups/layout/structure.md
@@ -4,7 +4,6 @@ children:
   - section-length
   - section-purpose
   - single-idea
-  - topic-sentence
   - white-spacing
   - title
   - lists
diff --git a/guidelines/groups/layout/structure/lists.md b/guidelines/groups/layout/structure/lists.md
index f54d1b03..6d3c9392 100644
--- a/guidelines/groups/layout/structure/lists.md
+++ b/guidelines/groups/layout/structure/lists.md
@@ -1,5 +1,5 @@
 ---
-status: exploratory
+status: developing
 ---
 
-Three or more :term[items] of related data are presented as bulleted or numbered lists.
+Lists must be visually, semantically, and structurally identifiable as a collection of related :term[items]. The relationship between list items should be clear, allowing users to perceive, understand, and navigate the list effectively, including with :term[assistive technologies].
diff --git a/guidelines/groups/layout/structure/topic-sentence.md b/guidelines/groups/layout/structure/topic-sentence.md
deleted file mode 100644
index 9db749cc..00000000
--- a/guidelines/groups/layout/structure/topic-sentence.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-status: exploratory
----
-
-For text intended to inform the user, each paragraph of text begins with a topic sentence stating the aim or purpose.