{BSDRS} Security Deposit Deposit Days to be made usable as a trigger

We currently cannot trigger a channel message to be sent based on the due date of the security deposit. I can set a trigger manually for e.g. 7 days before arrival, but if in the property rules I change the nr. of days before arrival due for the security deposit, this will not automatically adjust the trigger as it's hard set to e.g. 7 days (and not dynamically to x days based on property rules).