Q9. What should the appraiser do if compliance with the ANSI standard is not possible? If the appraiser is unable to adhere to the ANSI standard, they must enter “GXX001-” at the beginning of the Additional Features field of the appraisal report and provide an explanation of why they were not able to comply. For example, if the appraiser is performing an appraisal in a state that requires appraisers to adhere to a different measuring standard, the appraiser may use the exception code and the loan may still be eligible for purchase by Fannie Mae. See the Gross Living Area section of Selling Guide B4-1.3- 05, Improvements Section of the Appraisal Report for more information.