Everyone must comply with the Uniform Act if they are using Federal dollars for acquisition or for projects on property acquired for such projects (unless there is a rare exception specifically stated by federal law}. So, we should all start with the Uniform Act requirements when making appraisals. This said, there is some very useful information and guidance in the UASFLA that amplifies the requirements not stated specifically in the Uniform Act regulations(such as rental history, tenants, etc.), and case citations that have had an effect on developing policy for valuation requirements. The Uniform Act Regulations are not designed to provide the specifics of how its requirements are to be met, but to state the desired end results and, in general, state the criteria for achieving these end results. It is not a manual, a set of standards, a set of specifications, but a regulation. More easement and fee purchase by state and local groups are Partially funded via federal funds. This has become much more important as donations to land trusts and orgs has diminished. This means anybody doing any type of municipal, public agency or community work will need to know and understand yellow book