Final answer:
The reference provided does not contain information on the establishment of ARC-PA as the sole accrediting authority for PA programs. For accurate details, one should consult the ARC-PA's official website or educational sources related to medical accreditation.
Step-by-step explanation:
The ARC-PA, or Accreditation Review Commission on Education for the Physician Assistant, is the agency that has been authorized to accredit PA (Physician Assistant) programs in the United States. The establishment date or changes regarding ARC-PA's status as the sole accrediting authority for PA programs is not provided by the reference given from the Avalon Project at Yale Law School. The Avalon Project document, titled "32 Frame of Government of Pennsylvania-February 2, 1683", does not contain relevant information on the ARC-PA. Instead, it is related to the historical governance structure of Pennsylvania. For precise information on when the ARC-PA was established or recognized as the sole authority for PA program accreditation, it would be advisable to consult the ARC-PA's official website or other relevant educational sources that specifically detail the history and governance of medical accreditation in the U.S.