"The government sponsored enterprises (GSE), Fannie Mae and Freddie Mac, recently updated their Home Valuation Code of Conduct (HVCC) frequently asked questions (FAQ).  Both GSEs state that while there may be some differences with two sets of FAQs in terms of style or structure, they present no substantive differences in interpretation or implementation of HVCC.  Nor do they impose any different operational requirements.  The FAQs include new questions and are also organized by subject area."

SOURCE: via appraisalinsight.blogs.realtor.org

• Freddie Mac HVCC FAQ
  
• Fannie Mae HVCC FAQ