on 1:text:!rules:#channel: {
  if ($network == WyldRyde) {
    if (($calc(($ctime - %lastupdatetime)) >= 15) || (!%lastupdatetime)) {
      set %lastupdatetime $ctime
      /msg $chan Your-rules-or-message-goes-here 
    }
  }
}

; Display current trigger
; Usage: ?trigger (where ? can be any single character)
on 1:TEXT:$($chr(63) $+ trigger):#:{        
        /say $chan - Current trigger is %trigger $+ . To change it, type %trigger $+ settrigger <newtrigger>
}

; Settrigger
; Update the trigger to a new one
; Requires level 10 IAL (internal access list)
on 10:TEXT:$( %trigger $+ settrigger* ):#:{
        if ( $2 == $null ) {
                /say $chan - Error: You must specify a new trigger
        }
        else {
                        set %trigger $left( $strip( $2 ) , 1 )
                        /say $chan - Updated bot trigger to %trigger
        }
}

; TriggerTest
; Very useless, just displays a message
on 1:TEXT:$( %trigger $+ triggertest ):#:{
        /say $chan - This is a useless command that demonstrates using a changeable trigger!
}