I just glanced at the Fiduciary Accounts chapter of Bodman Longley's FICC Operations Manual. When discussing POAs, it references MCLA 700.495 - 497, MCLA 565.xxx, and MSA 27.5495-97, MSA 26.554.
Email me if you would like to see that section of the manual.
_________________________
My comments and opinions are my own, not my employer's.