At what point (time) before a game starts do they announce who starts as a sub?

[thegodfather]

like how many hours, anyone know?

[jakeoner1]

pretty sure its 40 minutes

[Ziplock]

I heard 90.

personally, I want to know why they don't have to release who is the sub until so close to the game... why can't they name them same time as the team :'(