(a) Section 67 of the Internal Revenue Code, relating to the 2-percent floor on miscellaneous itemized deductions, shall apply, except as otherwise provided.
(b) A deduction allowable under this part that exceeds three thousand dollars ($3,000) and is described in Section 17049, relating to computation of tax where taxpayer restores a substantial amount held under claim of right, may not be treated as a miscellaneous itemized deduction under Section 67 of the Internal Revenue Code, as applicable for purposes of this part.