An appraiser is asked to complete an assignment using only the cost approach due to a local regulation, even though USPAP would normally require consideration of all three approaches. This situation would require:

Option A: Declining the assignment

Declining the assignment is unnecessary when a jurisdictional exception can be properly invoked to resolve the conflict between USPAP and local regulation. An appraiser should only decline if they cannot competently complete the assignment or if ethical violations would occur.

Option B: Following the client's instructions

Simply following client instructions without proper documentation would violate USPAP, as it fails to address the conflict between professional standards and legal requirements. The appraiser must formally invoke and disclose the jurisdictional exception rather than just complying with instructions.

Option D: Using all three approaches despite the regulation

Using all three approaches despite the regulation would violate local law, which could expose the appraiser to legal liability and potentially invalidate the appraisal for its intended use. Legal requirements generally take precedence when properly documented through jurisdictional exceptions.