Section 469.090 - Special rules for interests under old transfersThe following rules set forth in subdivisions (1) and (2) of this section shall apply in the case of a vested interest or vested future interest created by a transfer made before 1977, and may apply in such case to lengthen, but shall not shorten, the time for disclaimer otherwise available:
(1) Such interest is subject to disclaimer in whole or in part for a reasonable time after the disclaimant has knowledge of the existence of the transfer;(2) If the interest has vested before the disclaimant's eighteenth birthday, and the disclaimant has knowledge of the existence of the transfer before the disclaimant's eighteenth birthday, such interest is subject to disclaimer in whole or in part until a reasonable time elapses after the disclaimant's eighteenth birthday, except that a written acceptance by the disclaimant's representative shall constitute an acceptance of any portion of the interest.