In performing a real
property appraisal consulting assignment, an appraiser must:
(a)
be
aware of, understand, and correctly employ those recognized methods and
techniques that are necessary to produce credible results;
(b)
not
commit a substantial error of omission or commission that significantly
affects the results of an appraisal consulting assignment; and
(c)
not render appraisal
consulting services in a careless or negligent manner, such as by making
a series of errors that, although individually might not significantly
affect the results, in the aggregate affect the credibility of those results.