How long does Balance keep data, and is it configurable


I am trying to find out how long Balance stores data, and if the retention periods are configurable. I can't find any mention in the documentation and have had a dig around the application and AMT but cannot find anything that looks like a method to configure this.

The customer would like to be able to modify how long data is stored for or at least know how long it is.

Any help would be hugely appreciated.