Q 139

A question about the magic items body slots; how does that work exactly?

The rule stats:

Quote Originally Posted by SRD
Of course, a character may carry or possess as many items of the same type as he wishes. However, additional items beyond those listed above have no effect.
So, is this a matter of order in which magic items are put on? Does the first item worn work normally, and any further put on the same slot inactive (for example, putting on a magic hat when you're already wearing a magic headband)?

And if so, if you remove the primary item, does the secondary one still in the slot immediately begins to give its benefit?