Bonus Depreication 168 Rule

Hello.

I am configuring an FA protoype in Oracle, and wondered about the 168 Bonus Depreication rules.

1)  Do I need to specifically configure under Setup, Depreciation, Bonus Rules; and apply to the appropriate Books/Categories.  If this is true, is there a web link to tell me what % and dates these are valid?

2) or do I just apply patches as they come out like patch 10415151.

3)  What do these kinds of patches do?  If my CORP books doesn't use 168 Rule and the Tax Books do, how do I know where it is applying it?

Thanks for any assistance.

Ann