21.30. For the purposes of this Part, where, at any time, a lender receives property in satisfaction of or in exchange for the lender’s right under a securities lending arrangement to receive the transfer or return of an identical security and the property received at that time is neither an identical property nor an amount deemed, under section 21.31, to have been received as proceeds of disposition, the following rules apply:(a) subject to paragraph b, the lender is deemed to have disposed, at that time, of the security initially transferred or lent for proceeds of disposition equal to the fair market value of the property received as consideration for the disposition of the right, other than any portion of the proceeds that is deemed to have been received by the lender as a taxable dividend;
(b) Division XIII of Chapter IV of Title IV of Book III, Division VI of Chapter IV of Title IX of Book III and Chapters V and VI of Title IX of Book III, as the case may be, apply in computing the income of the lender with respect to a disposition referred to in paragraph a as if the security initially transferred or lent had continued to be property of the lender and the lender had received the property directly.