--- a/spec/Overview-WebCryptoAPI.xml	Fri Jan 24 16:45:38 2014 -0800
+++ b/spec/Overview-WebCryptoAPI.xml	Fri Jan 24 16:54:49 2014 -0800
@@ -1231,6 +1231,13 @@
               </li>
               <li>
                 <p>
+                  If <code>key</code>.<a href="#dfn-Key-KeyUsage"><code>usages</code></a> does not
+                  contain the <code>"encrypt"</code> <a href="#dfn-KeyUsage"><code>KeyUsage</code></a>,
+                  terminate this algorithm with an error.
+                </p>
+              </li>
+              <li>
+                <p>
                   Create a new Promise object.
                 </p>
               </li>
@@ -1286,6 +1293,13 @@
               </li>
               <li>
                 <p>
+                  If <code>key</code>.<a href="#dfn-Key-KeyUsage"><code>usages</code></a> does not
+                  contain the <code>"decrypt"</code> <a href="#dfn-KeyUsage"><code>KeyUsage</code></a>,
+                  terminate this algorithm with an error.
+                </p>
+              </li>
+              <li>
+                <p>
                   Create a new Promise object.
                 </p>
               </li>
@@ -1340,6 +1354,13 @@
               </li>
               <li>
                 <p>
+                  If <code>key</code>.<a href="#dfn-Key-KeyUsage"><code>usages</code></a> does not
+                  contain the <code>"sign"</code> <a href="#dfn-KeyUsage"><code>KeyUsage</code></a>,
+                  terminate this algorithm with an error.
+                </p>
+              </li>
+              <li>
+                <p>
                   Create a new Promise object.
                 </p>
               </li>
@@ -1394,6 +1415,13 @@
               </li>
               <li>
                 <p>
+                  If <code>key</code>.<a href="#dfn-Key-KeyUsage"><code>usages</code></a> does not
+                  contain the <code>"verify"</code> <a href="#dfn-KeyUsage"><code>KeyUsage</code></a>,
+                  terminate this algorithm with an error.
+                </p>
+              </li>
+              <li>
+                <p>
                   Create a new Promise object.
                 </p>
               </li>
@@ -1564,6 +1592,13 @@
               </li>
               <li>
                 <p>
+                  If <code>baseKey</code>.<a href="#dfn-Key-KeyUsage"><code>usages</code></a> does not
+                  contain the <code>"deriveKey"</code> <a href="#dfn-KeyUsage"><code>KeyUsage</code></a>,
+                  terminate this algorithm with an error.
+                </p>
+              </li>
+              <li>
+                <p>
                   Let <var>promise</var> be a new <code>Promise</code> object and <var>resolver</var> its associated resolver.
                 </p>
               </li>
@@ -1636,6 +1671,13 @@
               </li>
               <li>
                 <p>
+                  If <code>baseKey</code>.<a href="#dfn-Key-KeyUsage"><code>usages</code></a> does not
+                  contain the <code>"deriveBits"</code> <a href="#dfn-KeyUsage"><code>KeyUsage</code></a>,
+                  terminate this algorithm with an error.
+                </p>
+              </li>
+              <li>
+                <p>
                   Let <var>promise</var> be a new <code>Promise</code> object and <var>resolver</var> its associated resolver.
                 </p>
               </li>

--- a/spec/Overview.html	Fri Jan 24 16:45:38 2014 -0800
+++ b/spec/Overview.html	Fri Jan 24 16:54:49 2014 -0800
@@ -1240,6 +1240,13 @@
               </li>
               <li>
                 <p>
+                  If <code>key</code>.<a href="#dfn-Key-KeyUsage"><code>usages</code></a> does not
+                  contain the <code>"encrypt"</code> <a href="#dfn-KeyUsage"><code>KeyUsage</code></a>,
+                  terminate this algorithm with an error.
+                </p>
+              </li>
+              <li>
+                <p>
                   Create a new Promise object.
                 </p>
               </li>
@@ -1295,6 +1302,13 @@
               </li>
               <li>
                 <p>
+                  If <code>key</code>.<a href="#dfn-Key-KeyUsage"><code>usages</code></a> does not
+                  contain the <code>"decrypt"</code> <a href="#dfn-KeyUsage"><code>KeyUsage</code></a>,
+                  terminate this algorithm with an error.
+                </p>
+              </li>
+              <li>
+                <p>
                   Create a new Promise object.
                 </p>
               </li>
@@ -1349,6 +1363,13 @@
               </li>
               <li>
                 <p>
+                  If <code>key</code>.<a href="#dfn-Key-KeyUsage"><code>usages</code></a> does not
+                  contain the <code>"sign"</code> <a href="#dfn-KeyUsage"><code>KeyUsage</code></a>,
+                  terminate this algorithm with an error.
+                </p>
+              </li>
+              <li>
+                <p>
                   Create a new Promise object.
                 </p>
               </li>
@@ -1403,6 +1424,13 @@
               </li>
               <li>
                 <p>
+                  If <code>key</code>.<a href="#dfn-Key-KeyUsage"><code>usages</code></a> does not
+                  contain the <code>"verify"</code> <a href="#dfn-KeyUsage"><code>KeyUsage</code></a>,
+                  terminate this algorithm with an error.
+                </p>
+              </li>
+              <li>
+                <p>
                   Create a new Promise object.
                 </p>
               </li>
@@ -1573,6 +1601,13 @@
               </li>
               <li>
                 <p>
+                  If <code>baseKey</code>.<a href="#dfn-Key-KeyUsage"><code>usages</code></a> does not
+                  contain the <code>"deriveKey"</code> <a href="#dfn-KeyUsage"><code>KeyUsage</code></a>,
+                  terminate this algorithm with an error.
+                </p>
+              </li>
+              <li>
+                <p>
                   Let <var>promise</var> be a new <code>Promise</code> object and <var>resolver</var> its associated resolver.
                 </p>
               </li>
@@ -1645,6 +1680,13 @@
               </li>
               <li>
                 <p>
+                  If <code>baseKey</code>.<a href="#dfn-Key-KeyUsage"><code>usages</code></a> does not
+                  contain the <code>"deriveBits"</code> <a href="#dfn-KeyUsage"><code>KeyUsage</code></a>,
+                  terminate this algorithm with an error.
+                </p>
+              </li>
+              <li>
+                <p>
                   Let <var>promise</var> be a new <code>Promise</code> object and <var>resolver</var> its associated resolver.
                 </p>
               </li>