I know it says must, but it also says something else. The use of the word MUST is improper and likley just mistated. The word 'Should' would be more correct use for an appraisal guideline.
I suppose one could argue that somewhere in report there must be two sales that occurred int he last 90 days as similar as possible, meaning any sale would do, even though it is not comparable.
Thats a pretty dumb way of doing something. IMHO I seriously doubt that is the intent of HUD.
Here:
http://www.HUD.gov/groups/appraisers.cfm
Appraisal Reporting Requirements in Declining Markets
Appraisals of properties located in declining markets must include at least two comparable sales that closed within 90 days prior to the effective date of the appraisal.
In some markets compliance with this requirement may be difficult or not possible due to the lack of market data and, in these cases, a detailed explanation is required. The appraiser is expected to include at least two sales that are as similar as possible to the subject and which settled within 90 days of the effective date of the appraisal in order to show recent market activity.
In order to ensure that FHA receives an accurate and thorough appraisal analysis, the inclusion of comparable listings and/or pending sales is required in appraisals of properties that are located in declining markets. Specifically, the appraiser must:
Include a minimum of two active listings or pending sales on the appraisal grid of the applicable appraisal reporting form in comparable 4-6 position or higher (in addition to the three settled sales).
Insure that active listings and pending sales are market tested and have reasonable market exposure to avoid the use of over priced properties as comparables. Reasonable market exposure is reflected by typical marketing times for the neighborhood. The comparable listings should be truly comparable and the appraiser should bracket the listings using both dwelling size and sales price whenever possible.
Adjust active listings to reflect list to sale price ratios for the market.
Adjust pending sales to reflect the contract purchase price whenever possible or adjust pending sales to reflect list to sale price ratios.
Include the original list price, any revised list prices, and total days on the market (DOM). Provide an explanation for DOM that do not approximate time frames reported in the Neighborhood section of the appraisal reporting form or that do not coincide with the DOM noted in the Market Conditions Addendum.
Reconcile the adjusted values of active listings or pending sales with the adjusted values of the settled sales provided. If the adjusted values of the settled comparables are higher than the adjusted values of the active listings or pending sales, the appraiser must determine if a market condition adjustment is appropriate. The final value conclusion should not be based solely on the comparable listing or pending sales data.
Include an absorption rate analysis, which is critical to developing and supporting market trend conclusions, as mandated by the Market Conditions Addendum. For example, assuming 36 sales during a six month period, the absorption rate is 6 sales per month (36/6).