"Income" or "earnings" means any periodic form of payment due to an individual, regardless of source, including without limitation wages, salary, commission, bonus, workers' compensation, disability, payments pursuant to a pension or retirement program, and [...]

(3) "Income," except for patients who are residents of other states, means that amount determined by adding to the gross income as now or hereafter defined in Georgia income tax laws, minus deductions and personal exemptions as authorized by such income tax laws, the items listed in this paragraph, if such items are not already included in gross income as defined above. For a patient who is a resident of another state, "income" means the same as above except no deductions will be made for any deductions or personal exemptions as authorized by Georgia income tax laws. The following items are to be added, respectively:

(3) "Income" means any and all income received by a peace officer for services rendered, whether such income is in the form of salary, fees, subsistence allowance or other type of allowance, or any combination thereof.

(4) "Income" means federal adjusted gross income, as defined in the Internal Revenue Code of 1986, as amended, from all sources.

"Income" means all income, from whatever source derived, including, but not limited to, wages, salaries, social security or railroad retirement income, public assistance income, realized capital gains, and workers' compensation. The department shall [...]