I have made the requested changes, and the resulting text looks like:

<modified text>
2.  CAPWAP AC DHCPv4 Option
[...]
   A DHCPv4 client, acting on behalf of a CAPWAP WTP, MUST request the
   CAPWAP AC DHCPv4 Option in a Parameter Request List Option, as
   described in [RFC2131] and [RFC2132].

   A DHCPv4 server returns the CAPWAP AC Option to the client if the
   server policy is configured appropriately and the server is
   configured with a list of CAPWAP AC addresses.

3.  CAPWAP AC DHCPv6 Option
[...]
   A DHCPv6 client, acting on behalf of a CAPWAP WTP, MUST request the
   CAPWAP AC DHCPv6 Option in a Parameter Request List Option, as
   described in [RFC3315].

   A DHCPv6 server returns the CAPWAP AC Option to the client if the
   server policy is configured appropriately and the server is
   configured with a list of CAPWAP AC addresses.
</modified text>