In the preparation of its budget a municipality shall limit any increase in said budget to 2.5% or the cost-of-living adjustment, whichever is less, over the previous year's final appropriations subject to the following exceptions:
The approval procedure in this subsection shall not apply to appropriations adopted for a purpose referred to in subsection d. or j. below;
In the first full year when an existing appropriation or expenditure that is subject to budget limitations is made an exception to budget limitations, a municipality shall deduct from its final appropriations upon which its permissible expenditures are calculated pursuant to section 2 of P.L. 1976, c.68 (C.40A:4-45.2), the amount which the municipality expended for that purpose during the last full budget year, or portion thereof, in which the purpose so excepted was funded from appropriations in the municipal budget.
In the first full year when an existing appropriation or expenditure that is not subject to budget limitations is made subject to budget limitations, a municipality shall add to its final appropriations upon which its permissible expenditures are calculated pursuant to section 2 of P.L. 1976, c.68 (C.40A:4-45.2), the amount which the municipality expended for that purpose during the last full budget year, or portion thereof, in which the purpose so excepted was funded from appropriations in the municipal budget.
N.J.S. § 40A:4-45.3