General rule is that I'll do one for any reason if I'm asked to by the league or either side pre-match. So I've held minutes silences when asked for club and league officials before and they're always well observed, even when it's one club's official and the other club has no connection to them.
But having said that, I don't feel it's my place to enforce a silence if neither club is asking for it to happen. I'd be prepared for the league or club to request one, but it's your call if you want to ask for it if no one else asks you.