You don't know that.  It could be your typical assignment, as is done with wages.  It might end or be reduced at some future time (as when the kids reach 18, or the spouse finishes school and finds a job).  Just because the last one you saw was a property settlement -- usually, involving military pensions -- doesn't mean the next one will be.  

Don't  be the practitioner who screws it up thinking there should have been a QDRO.  A little knowledge is a dangerous thing.