First, let me recommend in the strongest possible terms that you contact an attorney for advice on what is an important legal issue. You need to fully understand the liability issues before determining your course of action, and only a lawyer can provide you with the advise you seek.
That said, you can find the PA nurse practice regulations through a link on the PA Bd of Nursing website. Here is link to the page -you will need to click on the hot link near the middle of the page that says "RN Law": State Board of Nursing
. This will bring up an Adobe file with the PA law - here are just some of the relevant sections:
In order for a person to practice professional nursing during the one (1) year period from completion of his or her education program . . . the board may issue a temporary practice permit . . . The practice of professional nursing . . . within the definition of this act [is permitted] . . . pursuant to a temporary practice permit, by a graduate of an approved program of professional nursing in Pennsylvania or any other state, working under qualified supervision, during the period not to exceed one (1) year between the completion of his or her program and notification of the results of a licensing examination taken by such person
As the sections of PA law referenced above indicate, a graduate nurse - and certainly a student nurse - is essentially practicing under the license of the RN guiding her/him. Again, I cannot urge you strongly enough to get legal advice on this.