This bill provides a statutory method of income apportionment for nonresident corporate board members.  Under current Department of Revenue practice, a nonresident individual receiving compensation for serving on up to two corporate boards of directors is allowed to apportion income using an alternative method by dividing the time spent in Minnesota as a director on a corporate board by the total time spent as a director on a corporate board, and multiplying that fraction by the compensation paid for the board.  Service on boards of a unitary business are treated as serving on a single board.  The current apportionment method allowed does not apply to the apportionment of income for compensation on more than two boards.  Under this bill, the formula described above would apply for compensation for services as a member on all corporate boards of directors.  The bill is effective the day following final enactment and applies retroactively to all open taxable years and returns.