ED and deadline to send ACT scores to other schools

Hello. My child applied ED to a certain college and we’d like to wait until he hears back from them before we send his ACT scores to other schools. It looks like the ED decision should come out by December 15. If he doesn’t get in, the plan is to send the requests on December 15 or 16. Is this enough time for the schools to receive the scores for the RD deadline of January 1? Or, do we need to just pay up and send them ahead now so they will be waiting in his files if he applies. I have been searching the ACT website and CC for answers, but haven’t found any. Thanks. ( We understand that ED is binding. This is in case he doesn’t get in. He needs to have everything in line to apply for RD.)