Set default iOS local notification style for application

Starting with iOS 5, there are two notification styles: banner and alert (the "old" style). A user can set which style to use for each application in the settings. However, the default now seems to be that notifications are displayed banner style.

I'm using local notifications for reminders about events that will happen "now". A banner disappears shortly after it appeared (and it's not obvious enough that one can tap it), so for these notifications it would be desirable to have the alert style notifications as those stay on screen until the user decided on an action (ignore or go to app).

Is there a way either through code or for example Info.plist entries to tell iOS that the alert style notifications should be used by default (as long as the user hasn't configured something else)?

Update: The absence of information/documentation is not enough for me to have this settled. I want either something like a forum/blog post from someone with authority (Apple employee or someone along the lines of Erica Sadun) saying it's not possible, or if it is possible then I want the solution. A workaround like "ask the user to change the setting" isn't good enough either.

I would like to add something, since I've opened a TSI and somehow I asked about this and have been answered. From Quinn "The Eskimo!":

"This depends on you mean. You have some control over how the notification appears based on how you set the UILocalNotification properties (things like alertBody, soundName, and so on). However, if you're asking about the way in which those properties are interpreted (the things the user can customise in Settings > Notifications), those are user preferences and not exposed via any API."

I have an alarm app for which I also need this functionality. Under iOS5 if the user is using another app when it goes off then the banner appears. Consequently I spent a lot of time browsing for a solution.

However, it's not possible to control the style of alert generated by a UILocalNotification I'm afraid :(

You can see from the class reference that there's no provision for it:

http://developer.apple.com/library/IOs/#documentation/iPhone/Reference/UILocalNotification_Class/Reference/Reference.html

Or in the plist:

http://developer.apple.com/library/ios/#documentation/general/Reference/InfoPlistKeyReference/Articles/iPhoneOSKeys.html

Best thing to do is tell the user what to do to change the settings.