Appealing to the taxation board of review

(a) The notice of appeal to the taxation board of review shall be lodged with the board and assessor no later than the date fixed by law for the taking of the appeal. An appeal to the taxation board of review shall be deemed to have been taken in time if the notice thereof shall have been postmarked and properly addressed to the board and assessor, on or before that date. (b) The notice of appeal shall be in writing and any notice, however informal it may be, identifying the assessment involved in the appeal and stating the grounds of objection to the assessment shall be sufficient. (c) The appeal shall be considered and treated for all purposes as a general appeal and shall bring up for determination all questions of fact and all questions of law, excepting questions involving the Constitution or laws of the United States, necessary to the determination of the objections raised by the taxpayer in the notice of appeal. If any objection involving the Constitution or laws of the United States is included by the taxpayer in the notice of appeal, the objection may be heard and determined by the tax appeal court on appeal from a decision of the taxation board of review; provided that this subsection shall not be construed to confer upon the board the power to hear or determine the objection. Any notice of appeal may be amended at any time before the board's decision; provided that the amendment does not substantially change the dispute.