diff --git a/index.html b/index.html
index 13fced8..06ba4ca 100644
--- a/index.html
+++ b/index.html
@@ -693,17 +693,17 @@ <h3>Options</h3>
       </p>
       <h4>Options Extensibility</h4>
       <p>
-Implementations may extend an `options` object with additional properties.
-Property keys may be any string but they should be appropriately namespaced (for example by using URIs)
+Implementations MAY extend an `options` object with additional properties.
+Property keys can be any string but they should be appropriately namespaced (for example by using URIs)
 in order to avoid collisions with extensions in other implementations.
       </p>
       <p>
-As extension properties are implementation specific, they should not be mandatory.
+As extension properties are implementation specific, they ought not be mandatory.
 This is to maintain interoperability by avoiding clients needing to be modified to use a specific implementation.
       </p>
       <p>
-When adding an extension `options` property, consider if providing optionality to clients is necessary.
-If not, using instance configuration to vary API functionality may be a preferable approach.
+When adding an extension `options` property, consider whether providing optionality to clients is necessary.
+If not, using instance configuration to vary API functionality might be a preferable approach.
       </p>
     </section>
     <section>