(a) Each board of assessment or Department of Finance or Department of Land Use shall revise all valuations and assessments of assessable property in their counties, and lower or increase the assessments and valuations.
(b) Each board of assessment or Department of Finance or Department of Land Use may correct errors in assessment lists at any time.
(c) Revisions and corrections shall be subject to the notice requirements of this chapter when they result in an increased valuation.