2.Spouses. Spouses, both of whom are required to file returns under this Part, are allowed to claim itemized deductions from Maine adjusted gross income only if both do so. Their total itemized deductions from federal adjusted gross income, as modified by subsection 3, may be taken by either spouse or divided between them, as they may elect, if their federal income tax is determined on a joint return but their tax under this Part is determined on separate returns. The total itemized deductions from Maine adjusted gross income claimed on a return may not exceed the limitation amount in subsection 4. [2013, c. 368, Pt. TT, §10(AMD); 2013, c. 368, Pt. TT, §20(AFF).]