4.1.5. About the Sixth Edition.As noted, this is the sixth edition of the Uniform Appraisal Standards for Federal Land Acquisitions. With the passage of 16 years since publication of the previous edition, some topics of great importance in past decades have become less significant, and some issues that were controversial or unsettled have been resolved by the courts. Of course, some valuation problems remain as vital today as in years past. And while the underlying legal principles are unchanged, recent court rulings contain practical examples of how to apply the underlying law to actual valuation problems. Therefore, this Section includes case studies and citations to instructive court opinions. Most of these citations are eminent domain cases, which are often difficult to distinguish by case name.197 To assist the reader, frequently cited cases include common names or reference a distinctive property location, landowner name, or public project for which property was acquired.198 A table of all cases and other authorities cited in these Standards is included in the Appendix.