What key requirement must an appraiser disclose when using a hypothetical condition?

When an appraiser utilizes a hypothetical condition in their work, it's essential to disclose that this condition may influence the assignment's results. A hypothetical condition represents a situation that is contrary to known facts but is assumed for the purpose of the appraisal. By acknowledging that this assumption could impact the value or outcome of the appraisal, the appraiser provides transparency to clients and users of the report. This awareness is crucial, as it informs the intended audience about the potential effects of their decisions based on the appraisal's findings.

The other considerations, while relevant in the context of appraisal ethics and guidelines, do not encapsulate the primary concern of how a hypothetical condition might directly influence the appraisal results. Thus, highlighting its possible effects is the key requirement in these scenarios.