California Code, Revenue and Taxation Code - RTC § 24962

(a) If the property was acquired, after February 28, 1913, in any income year beginning before January 1, 1934, and the basis thereof, for purposes of the Revenue Act of 1932  1 was prescribed by Section 113(a)(6), (7), or (9) of such act (47 Stat. 199), then for purposes of this part the basis shall be the same as the basis therein prescribed in the Revenue Act of 1932.

(b) If the property was acquired, after February 28, 1913, in any income year beginning before January 1, 1937, and the basis thereof, for purposes of the Revenue Act of 1934,  1 was prescribed by Section 113(a)(6), (7), or (8) of such act (48 Stat. 706), then for purposes of this part the basis shall be the same as the basis therein prescribed in the Revenue Act of 1934.

(c) If the property was acquired after February 28, 1913, in a transaction to which the Bank and Corporation Tax Law of 1954 applied, and the basis thereof, for purposes of the Bank and Corporation Tax Law of 1954, was prescribed by Section 25071(d), 25071(e), or 25071(f) of such law, then for purposes of this part the basis shall be the same as the basis therein prescribed in the Bank and Corporation Tax Law of 1954.

(d) Stock rights acquired after February 28, 1913, and before January 1, 1955, shall have the basis assigned to such property under Section 25071m of the Bank and Corporation Tax Law of 1954.