iOS4 Create Background Timer

Question

I (Basically) need to create a background timer on iOS 4 that will allow me to execute some code when a specific amount of time has passed. I have read that you can accompli

Answer 1

Are these suggested methods only applicable if the application is enabled for background execution (using UIBackgroundMode) in the first place?

I presume if an application cannot legitimately claim to be a voip/music/location aware app then if it implements what is described here it will not execute when the time interval expires?