New Jersey Statutes Title 54. Taxation 54 § 4-62

a. If it shall appear to the satisfaction of the Superior Court, in a proceeding in lieu of prerogative writ, that an assessment of taxes reviewed thereby is at a rate higher than authorized by the law or resolution authorizing the assessment, or that the value of taxable property for which a person is therein assessed, is too great, the court shall amend the assessment and reduce it to the proper and just amount, in accordance with the provisions of this act.

b. Whenever the Superior Court is satisfied by the proofs that the ratio of the assessed valuation of the subject property to its true value exceeds the upper limit or falls below the lower limit of the common level range, it shall revise the taxable value of the property by applying the average ratio to the true value of the property except as hereinafter provided.

c. If the average ratio is below the county percentage level, and the ratio of the assessed value of the subject property to its true value exceeds the county percentage level, the court shall reduce the taxable value of the property by applying the average ratio to the true value of the property.

d. If both the average ratio and the ratio of the assessed value of the subject property to its true value exceed the county's percentage level, the court shall revise the taxable value of the property by applying the county percentage level to the true value of the property.

e. The provisions of this act shall not apply to any appeal from an assessment of real property taken with respect to the tax year in which the taxing district shall have completed and put into operation a district-wide revaluation program approved by the Director of Taxation pursuant to chapter 424, laws of 1971.  1