Prohibit naming of elements

Adds new naming requirements section.

Additional work and review needed.  
Need to indicate all elements with implicit roles which prohibit naming

closes #147

index.html

@@ -3052,6 +3052,43 @@ <h2 id="docconformance">
 &lt;/figure&gt;
 </pre><!-- source: http://www.geocities.com/SoHo/7373/aquatic.htm#fish -->
       </aside>
+      <section class="proposed addition">
+        <h3 id="docconformance-naming">
+          Requirements for use of ARIA attributes to name <!-- and describe --> elements
+        </h3>
+        <!-- <section>
+          <h4>Elements with implicit ARIA roles which prohibit naming</h4> -->
+          <p>
+            Authors MAY use <a data-cite="wai-aria-1.2/#aria-label">`aria-label`</a> and <a data-cite="wai-aria-1.2/#aria-labelledby">`aria-labelledby`</a> attributes to specify <a data-cite="accname-1.2/#dfn-accessible-name">accessible names</a> for elements which have an implicit or explicit ARIA role which allows naming from authors. [[[wai-aria-1.2]]] defines <a data-cite="wai-aria-1.2/#namefromprohibited">roles which cannot be named</a>.
+          </p>
+          <p>
+            Authors MUST NOT specify `aria-label` or `aria-labelledby` on elements that expose an ARIA role which cannot be named. Elements whose implicit ARIA roles prohibit naming from authors are identified in [[[#docconformance]]].
+          </p>
+          <p>
+            The following markup example demonstrates a selection of HTML elements with implicit ARIA roles that prohibit naming from authors.
+          </p>
+          <pre class="HTML example" title="Elements with implicit ARIA roles which prohibit naming from authors">
+            &lt;!-- Avoid doing the following! -->
+            &lt;p aria-label="...">...&lt;/p>
+
+            &lt;span aria-label="...">...&lt;span>
+
+            &lt;code aria-label="...">...&lt;code>
+
+            &lt;div aria-labelledby="...">...&lt;/div>
+          </pre>
+          <p>
+            The following markup example demonstrates elements which have explicit ARIA roles which allow naming from authors, and thus `aria-label` and `aria-labelledby` attributes are allow.
+          </p>
+          <pre class="HTML example" title="Elements with explicit ARIA roles which allow naming from authors">
+            &lt;p role="link" tabindex="0" aria-label="...">...&lt;/p>
+
+            &lt;span role="button" tabindex="0" aria-label="...">...&lt;span>
+
+            &lt;div role="article" aria-labelledby="...">...&lt;/div>
+          </pre>
+        <!-- </section> -->
+      </section>
       <section>
         <h3 id="docconformance-attr">
           Requirements for use of ARIA attributes in place of equivalent HTML attributes