help:about Destination Address parameter of COREF

Hello :
I have a question about SUA COREF Message ,in RFC3868 describe of
Destination Address parameter of COREF is
"NOTE *1:    Destination Address parameter will be present in case
               that the received CORE message conveys the Source
               Address parameter.  "
it define Destination Address is CORE's Source Address.but COREF
Destination Address parameter is a optional parameter,so it is not a
according of routing.

in Q.714 ,it's not define clearly which address will chose in CREF called
party address parameter.but it said that DIS_CONNECTIND message responding
address is CREF called party address,description is in below

"It is the task of the outgoing international gateway2 (or originating
international node) to make sure that the calling party address or
responding address (i.e. called party address parameter in a CC or CREF
message) satisfies the following rules:"

in Q.711,it said

"The "responding address" parameter is present in the N-DISCONNECT
primitive only in the case where the primitive is used to indicate
rejection of a signalling connection establishment attempt by an SCCP user
function. The parameter conveys the address of the service access point
from which the N-DISCONNECT-request was issued and under circumstances like
that mentioned above the "responding address" may be different from the
"called address" in the corresponding N-CONNECT request primitive."

from the description of "responding address",it's address of
N-DISCONNECT-request point.

I think it's conflicting in description between RFC3868 and Q71X,which
should be of Destination Address parameter? Thanks.