While that decision is still yet to be made, the Austrian said he hoped the matter would be resolved by the time racing resumes at Spa-Francorchamps this weekend.
He said: “We want to take the decision in the summer [break].
“There are a variety of opinions also within the team and the Daimler board, and we just need to stick our heads together and say, ‘Okay, what is everybody thinking?'”
Just eight points separate Hamilton and Verstappen at the top of the drivers’ standings after 11 races.
McLaren ace Norris was the best of the rest in the first half of the season, and sits five points ahead of Bottas with Red Bull’s Sergio Perez also hot on their heels.
Free practice at Spa begins on Friday, with qualifying scheduled to begin at 2pm on Saturday and the race exactly 24 hours later.