Clubs can hold friendlies until then, but venues must be no more than 90 minutes away. Players must arrive and leave in their full kit.
Moyes said: "If you consider this a pre-season period, most teams would have had quite a few friendlies under their belts. All the clubs are not going to get game practice
"I think us getting the opportunity to do that gives us a chance to try and set up a couple of games behind closed doors, if we can do that.
"All of it is subject to protocols. We need to make sure everything is correct before we even arrange the games. Of course we are not going to ask teams to travel and we are not going to travel.
"We don't want anything to go wrong while we are leading up to the start of the Premier League."