Sec. 1. 36 MRSA §5122, sub-§2, śM, as amended by PL 2003, c. 391, §5, is further amended to read:

M. For each individual who is a primary recipient of benefits under an employee retirement plan, an amount that is the lesser of:

(1) Six thousand dollars reduced by the total amount of the individual's social security benefits and railroad retirement benefits paid by the United States, but not less than $0. The maximum social security benefit reduced by the total amount of the individual's social security benefits and railroad retirement benefits paid by the United States, but not less than $0, except that this reduction does not apply to benefits paid under a military retirement plan;.__The assessor by September 15th of each year shall determine the amount of the deduction and incorporate the change, if any, into the income tax forms, instructions and withholding tables for the taxable year; or

(2) The aggregate of benefits under employee retirement plans included in the individual's federal adjusted gross income.

For purposes of this paragraph, the following terms have the following meanings. "Primary recipient" means the individual upon whose earnings the employee retirement plan benefits are based or the surviving spouse of that individual. "Employee retirement plan" means a state, federal or military retirement plan or any other retirement benefit plan established and maintained by an employer for the benefit of its employees under the Code, Section 401(a), Section 403 or Section 457(b), except that distributions made pursuant to a section 457(b) plan are not eligible for the deduction provided by this paragraph if they are made prior to age 55 and are not part of a series of substantially equal periodic payments made for the life of the primary recipient or the joint lives of the primary recipient and that recipient's designated beneficiary. "Employee retirement plan" does not include an individual retirement account under Section 408 of the Code, a Roth IRA under Section 408A of the Code, a rollover individual retirement account, a simplified employee pension under Section 408(k) of the Code or an ineligible deferred compensation plan under Section 457(f) of the Code. Benefits under an employee retirement plan do not include