1. An election by or on behalf of a surviving spouse to take the share provided in section 633.211 , 633.212 , 633.236 , 633.238 , 633.240 , or 633.244 shall be binding and shall not be subject to change except for such causes as would justify an equitable decree for the rescission of a deed. 2. An affirmative election to take under the will, receive the intestate share, or take under the revocable trust shall be irrevocable when filed as provided in section 633.237 . [C66, 71, 73, 75, 77, 79, 81, §633.246 ] 2009 Acts, ch 52, §5, 14 ; 2012 Acts, ch 1123, §4, 32 Referred to in §633.236 , 633.237