In all cases where language of a present statute is incorporated in an amendment, the language must be copied from and compared with the appropriate volume of the Laws of Pennsylvania so as to make absolutely certain that the copy is exact in all details with the original. If the provision has been previously amended, the language is copied from the Laws of Pennsylvania where it was last amended. The title must always be copied from and compared with the Laws of Pennsylvania so as to minimize the possibility of errors. Where the appropriate volume of the Laws of Pennsylvania has not been published, the slip laws are used.
101 Pa. Code § 15.205