Period in which items of gross income included.
Section 39
SEC. 39. Period in which items of gross income included. — The amount of all items of gross income shall be included in the gross income for the taxable year in which received by the taxpayer, unless, under methods of accounting permitted under Section 38 any such amounts are to be properly accounted for as of a different period. In the case of the death of a taxpayer there shall be included in computing net income for the taxable period in which falls the date of his death, amounts accrued up to the date of his death if not otherwise properly allowable in respect of such period or a prior period.