26 CFR § 1.273-1 - Life or terminable interests.
(a) In general. Amounts paid as income to the holder of a life or a terminable interest acquired by gift, bequest, or inheritance shall not be subject to any deduction for shrinkage (whether called by depreciation or any other name) in the value of such interest due to the lapse of time. In other words, the holder of such an interest so acquired may not set up the value of the expected future payments as corpus or principal and claim deduction for shrinkage or exhaustion thereof due to the passage of time. For the treatment generally of distributions to beneficiaries of an estate or trust, see Subparts A, B, C, and D (section 641 and following), Subchapter J, Chapter 1 of the Code, and the regulations thereunder. For basis of property acquired from a decedent and by gifts and transfers in trust, see sections 1014, 1015, and 1022, and the regulations thereunder.
(b) Effective/applicability date. The provisions in this section are applicable for taxable years beginning on or after September 16, 1958. The provisions of this section relating to section 1022 are effective on and after January 19, 2017.