(1) Where the same object is left to more than one person, then if one of them ceases to be a person provided for before or after the devolution of the inheritance, their share accrues to the other persons provided for in proportion to their shares. This applies even if the testator has specified the shares of the persons provided for. If some of the persons provided for are entitled to the same share, accrual occurs among these persons first.
(2) The testator may exclude the accrual.