Did some digging and massive Googling hun...
It can be prepped and immediately stored in the fridge for up to 24 hrs, and you can re-heat it before feeding bubs.
Looks like the standard powder formula rules apply.
FYI: Cooled boiled water actually means water that is still above 70C to ensure any ickies in the powder are eliminated. If you bring the water to a boil in your kettle, let it boil rapidly for about 3-5 mins, then shut it off... it will cool down to about 70C in 15-20mins.
Hope that helps!