Special rule for estates

In the case of taxable years of an estate ending less than 2 years after the date of the death of the decedent, this subsection shall apply to all rental real estate activities with respect to which such decedent actively participated before his death.

For purposes of subparagraph (A), the $25,000 amount under paragraph (2) shall be reduced by the amount of the exemption under paragraph (1) (without regard to paragraph (3)) allowable to the surviving spouse of the decedent for the taxable year ending with or within the taxable year of the estate.