diff --git a/cfgov/unprocessed/apps/regulations3k/css/reg-search.scss b/cfgov/unprocessed/apps/regulations3k/css/reg-search.scss
index df8e5ddfe4..e8aad99154 100644
--- a/cfgov/unprocessed/apps/regulations3k/css/reg-search.scss
+++ b/cfgov/unprocessed/apps/regulations3k/css/reg-search.scss
@@ -37,38 +37,34 @@
     border: 1px solid var(--gray-40);
     background-color: var(--gray-5);
 
-    .o-expandable__content,
-    .o-expandable__header {
-      border: 0;
-      padding: 0;
-      &::before,
-      &::after {
-        border: 0;
-        padding: 0;
-      }
-    }
-
     .reg-checkbox {
       display: inline-block;
     }
     .num-results {
       float: right;
     }
+    .o-form__group {
+      margin-bottom: 0;
+    }
+
+    // TODO: Create sidebar filter pattern and remove expandable customizations.
     .o-expandable {
       padding-bottom: 15px;
       border-bottom: 1px solid var(--gray-40);
       margin-bottom: 15px;
-      &:nth-child(3n) {
+      &:last-child() {
         border-bottom: none;
       }
-      &__label {
-        @include h4;
-        // Override for h4 margin.
-        margin-bottom: 0;
-      }
     }
-    .o-form__group {
-      margin-bottom: 0;
+    .o-expandable__content,
+    .o-expandable__header {
+      border: 0;
+      padding: 0;
+      &::before,
+      &::after {
+        border: 0;
+        padding: 0;
+      }
     }
   }
   .content__main {