 Appraisal reports written where USPAP compliance is a requirement or assignment condition will usually be written with a separate section, or sometimes two distinct separate sections, enumerating and explaining the rationale for and effects on value or utility of all extraordinary assumptions and hypothetical conditions.The distinction between extraordinary assumptions and hypothetical conditions can be a matter of law or professional standards in the field of real estate appraisal in the United States where the distinction is not only codified in USPAP, but enforced by various state real estate appraiser commissions or professional boards.However, the concepts are clearly applicable to appraisal ethics and professional conduct for all forms of valuation, including mass appraisal, personal property appraisal, and business valuation, as promoted by most appraisal professional organizations and associations.