This field is used to give a screen that defines a list of recodification codes. If this screen is entered, at the end of the creation, the setups copied from the reference folder are renamed according to the renaming rules defined by the considered codes (taken in the order).
This is particularly useful when, for example, the user wants to create a single-legislation folder: some setup codes, prefixed by a legislation code, are particularly heavy to use in that specific case, and the recodification can simplify the use of setups afterwards.