Comment on (i)–(v): If the necessary subject property information is not available because of assignment conditions that limit research opportunity (such as conditions that preclude an onsite inspection or the gathering of information from reliable third-party sources), an appraiser must:
obtain the necessary information before proceeding, or
where possible, in compliance with Standards Rule 1-2(g), use an extraordinary assumption about such information.
An appraiser may use any combination of a property inspection and documents, such as a physical legal description, address, map reference, copy of a survey or map, property sketch, or photographs, to identify the relevant characteristics of the subject property. Identification of the real property interest appraised can be based on a review of copies or summaries of title descriptions or other documents that set forth any known encumbrances. The information used by an appraiser to identify the property characteristics must be from sources the appraiser reasonably believes are reliable.