Is a 90 Min boil after Double Decoction necessary?

[Demaskee]

I'm doing an Oktoberfest beer this week and am trying a double decoction mash for the first time. Normally a beer like this would boil for 90 mins to reduce DMS issues. Does the decoction method allow me to do a 60 min boil instead?

 

[MrHadack]

You're only boiling small portions of the mash in the decoction process, not the entire thing. So you still should boil for 90 minutes.