The Commission shall modify, remand or reverse the decision of the wetlands board if:
1. The wetlands board, in reaching its decision, failed to fulfill its responsibilities under the coastal primary sand dune zoning ordinance; or
2. The substantial rights of the appellant or the applicant have been prejudiced because the findings, conclusions, or decisions of the board are:
a. In violation of constitutional provisions;
b. In excess of statutory authority or jurisdiction of the wetlands board;
c. Made upon unlawful procedure;
d. Affected by other error of law;
e. Unsupported by the evidence on the record considered as a whole; or
f. Arbitrary, capricious, or an abuse of discretion.
1992, c. 836.