Move 'contributes' check to add a CSS style sheet

Author: domfarolino

cssom-1/Overview.bs

@@ -1157,9 +1157,14 @@ steps:
 
 <ol>
  <li>Add the <a>CSS style sheet</a> to the list of
- <a>document or shadow root CSS style sheets</a> at the appropriate location. The
- remainder of these steps deal with the
- <a>disabled flag</a>.
+ <a>document or shadow root CSS style sheets</a> at the appropriate location.
+
+ <li>
+  <p>If the <a>CSS style sheet</a>'s <a for=CSSStyleSheet>owner node</a> <a>contributes a
+ script-blocking style sheet</a>, then user agents must <a for=list>append</a> the <a
+ for=CSSStyleSheet>owner node</a> to its <a>node document</a>'s <a for=Document>script-blocking
+ style sheet set</a>.</p>
+ <p class="note">The remainder of these steps deal with the <a>disabled flag</a>.</p>
 
  <li>If the <a>disabled flag</a> is set, then return.
 
@@ -1544,10 +1549,6 @@ must be run:
    </ol>
  </ol>
 
-If <var>node</var> <a>contributes a script-blocking style sheet</a>, then user agents must <a
-for=list>append</a> <var>node</var> to its <a>node document</a>'s <a for=Document>script-blocking
-style sheet set</a>.
-
 </div>
 
 ### Requirements on user agents Implementing the HTTP Link Header ### {#requirements-on-user-agents-implementing-the-http-link-header}