When should an updated résumé be submitted?

I am still waiting to hear from 4 of the schools I applied to (application submitted in November) and received a notable award at the company I work for at the end of 2017. Since I've been out of school for a few years I consider this an award worth informing schools of but I've noticed that some blatantly state to submit updated résumés while others don't. Should I submit an updated résumé if a school doesn't specifically say I should? I assume that it wouldn't hurt but could be wrong, any thoughts?