Got this off the Net somewhere:
K Code Usage
K0 >3 Minute Response
K1 Responding to Incident.
K2 Arrived at Incident.
K3 At Incident available to run.
K4 Mobile and available in home area.
K5 Off and clear at home station.
K6 Available in another stations area.
K7 At another station...
K8 (Appliances) = Delayed response.
K8 (On call) = Available at home.
K9 (Appliances) = Vehicle unattended.
K9 (On call) = On pager.
K10 Activate hyperbaric chamber.
K11-(X) Amulance required (Qty casualties).
K12 ETSA required.
K13 SAGasCo required.
K14 Police required (reason).
K15 Fire cause investigator required.
K16 SES required (reason).
K17 CFS required (reason).
K23 Specialist advice required.
K24 Dangerous goods info required.
K24- 2 Dangerous goods info to follow.
K25 Unable to proceed (reason).
K26 Proceed to and stand by at...
K27 Arrived at...
K28 Return to station.
K29 Return other appliances
K30 Received stop for Incident
K31 Proceed code green
K31 -2 Proceed code red
K32 Request alarm status.
K32 - 2 Alarm has cleared.
K32 - 3 Alarm has not cleared.
K34 Details to follow.
K35 Request map reference.
K36 Verify address.
K37-(CH) Change to channel xx
K38 Initial control.
K38 - 2 Initial control centre.
K38 - 3 Incident control centre.
K39 Change of command (Name).
K40 Bomb alert.
K41 Fatality/ies.
K42 Persons reported.
K43 Persons accounted for.
K44 Appliances involved for extended time.
K45 No further developments.
K46 Relief crews required.
K55 Arrived on scene, Special services incident (Vehicle accident, storm damage etc)
K66 Arrived on scene, Rubbish, grass etc. fire.
K77 Arrived on scene, No sign of fire.
K88 Arrived on scene, Small property fire.
K99 Arrived on scene, Well Involved.