LTM persistence

A virtual server has a default persistence profile set (cookie) and an iRule assigned as below

Which of these will take preference?

when CLIENT_ACCEPTED {

log local0. "Start Log"

log local0. "Client Connect: [IP::client_addr]:[TCP::client_port]"

if { [class match [IP::client_addr] equals addresslist] } {

pool SF-ECRPREP

persist source_addr

log local0. "Sent to Pool [LB::server addr] with Source Persist"

log local0. "End Log"

        }

else {

log local0. "Start Log"

log local0. "Client Connect: [IP::client_addr]:[TCP::client_port]"

pool SF-ECRPREP

persist cookie insert ECRPREP 0

log local0. "Sent to Pool [LB::server addr] with Cookie Persist"

log local0. "End Log"

} 

}