[SR-Users] min expires question

Hello This is how my registrar module is configured, hoping that min-expires set to 30 wont allow registration attempts more often than 30 seconds, but if I configure a UAC to register every 15 seconds I see that kamailio allows it. Shouldn't it reply with "422 Session Interval Too Small" or "423 Interval Too Brief"? # ----- registrar params ----- modparam("registrar", "default_expires", 120) modparam("registrar", "min_expires", 30) modparam("registrar", "method_filtering", 1) /* uncomment the next line to disable parallel forking via location */ # modparam("registrar", "append_branches", 0) /* uncomment the next line not to allow more than 10 contacts per AOR */ #modparam("registrar", "max_contacts", 10) 131.380336 192.168.1.6 -> 192.168.1.194 SIP Request: REGISTER sip:192.168.1.194 131.381174 192.168.1.194 -> 192.168.1.6 SIP Status: 200 OK (1 bindings) 144.386014 192.168.1.6 -> 192.168.1.194 SIP Request: REGISTER sip:192.168.1.194 144.387110 192.168.1.194 -> 192.168.1.6 SIP Status: 200 OK (1 bindings) 157.395358 192.168.1.6 -> 192.168.1.194 SIP Request: REGISTER sip:192.168.1.194 157.396340 192.168.1.194 -> 192.168.1.6 SIP Status: 200 OK (1 bindings) 170.404905 192.168.1.6 -> 192.168.1.194 SIP Request: REGISTER sip:192.168.1.194 170.405771 192.168.1.194 -> 192.168.1.6 SIP Status: 200 OK (1 bindings) 183.414375 192.168.1.6 -> 192.168.1.194 SIP Request: REGISTER sip:192.168.1.194 183.415217 192.168.1.194 -> 192.168.1.6 SIP Status: 200 OK (1 bindings) txs fborot