| 3. Witnesses; discovery. All witnesses must be sworn. Sworn |
| written evidence may not be admitted unless the author is |
| available for cross-examination or subject to subpoena; except |
| that sworn statements by a medical doctor or osteopathic |
| physician relating to medical questions, by a psychologist |
relating to psychological questions or, by a chiropractor |
| relating to chiropractic questions, by a certified nurse |
| practitioner who qualifies as an advanced practice registered |
| nurse relating to advanced practice registered nursing questions |
| or by a physician's assistant relating to physician assistance |
| questions are admissible in workers' compensation hearings only |
| if notice of the testimony to be used is given and service of a |
| copy of the letter or report is made on the opposing counsel 14 |
| days before the scheduled hearing. |