arc26k general format

ARCs/arc-0026-k.md

@@ -20,7 +20,7 @@ This URI specification represents an extension to the base Algorand URI encoding
 
 As in [ARC-26](./arc-0026.md), URIs follow the general format for URIs as set forth in <a href="https://www.rfc-editor.org/rfc/rfc3986">RFC 3986</a>. The path component consists of an Algorand address, and the query component provides additional transaction parameters.
 
-Elements of the query component may contain characters outside the valid range. These must first be encoded according to UTF-8, and then each octet of the corresponding UTF-8 sequence must be percent-encoded as described in RFC 3986.
+Elements of the query component may contain characters outside the valid range. These are handled depending on thieir usual character set. The text components (note, xnote) must first be encoded according to UTF-8, and then each octet of the corresponding UTF-8 sequence must be percent-encoded as described in RFC 3986. The key components (votekey, selkey, etc.) must be encoded with base64url as specified in <a href="https://www.rfc-editor.org/rfc/rfc4648.html#section-5">RFC 4648 section 5</a>.
 
 ### ABNF Grammar