(1)The basic amount of estate income relating to a person's limited interest in the whole or part of the residue of an estate for a tax year is the total of the sums within section 654(2)(b), (3)(c) and (4)(c) for that year.
(2)This does not apply, and section 675 applies instead, if the limited interest is one to which section 674 (successive interests: holders of limited interests) applies.