diff --git a/customizations/mei-Neumes.xml b/customizations/mei-Neumes.xml
index c8985d955..4cfcf426e 100644
--- a/customizations/mei-Neumes.xml
+++ b/customizations/mei-Neumes.xml
@@ -111,13 +111,13 @@
         <classSpec ident="model.layerPart.cmn" module="MEI.shared" type="model" mode="delete"/>
 
         <!-- Disallow events within layer -->
-        <classSpec ident="model.eventLike" module="MEI.shared" type="model" mode="replace">
+        <!-- <classSpec ident="model.eventLike" module="MEI.shared" type="model" mode="replace">
           <desc>groups event elements that occur in all notational repertoires.</desc>
           <classes>
             <memberOf key="model.syllablePart"/>
             <memberOf key="model.rdgPart.critapp"/>
           </classes>
-        </classSpec>
+        </classSpec> -->
 
         <!-- Disallow neume events within layer; only permitted in mei-all customization -->
         <classSpec ident="model.eventLike.neumes" module="MEI.neumes" type="model" mode="replace">
@@ -127,6 +127,26 @@
             <memberOf key="model.rdgPart.critapp"/>
           </classes>
         </classSpec>
+        
+        <!-- Allow custos and clef to appear within layer; compensate side effect of removing membership in model.layerPart from model.eventLike -->
+        <elementSpec ident="custos" module="MEI.shared" mode="change">
+          <classes mode="change">
+            <memberOf key="model.layerPart.neumes" mode="add"/>
+          </classes>
+        </elementSpec>
+        <elementSpec ident="clef" module="MEI.shared" mode="change">
+          <classes mode="change">
+            <memberOf key="model.layerPart.neumes" mode="add"/>
+          </classes>
+        </elementSpec>
+        
+        <!-- remove custos and clef (among others) from within syllable -->
+        <classSpec ident="model.eventLike" module="MEI.shared" type="model" mode="change">
+          <classes mode="change">
+            <memberOf key="model.syllablePart" mode="delete"/>
+          </classes>
+        </classSpec>
+        
 
       </schemaSpec>
     </body>