This study analyzes and predicts the spread of three different types of land use legislation: mandatory local growth management, major facility siting, and critical areas protection. Chapter 2 focuses on innovative statutes that provide a new or expanded role for state agencies in supervising local control of development. The three statutes examined are mandatory local comprehensive planning, mandatory local subdivision control, and mandatory local zoning regulation. Chapter 3 involves new or expanded state control over the location of major facilities that have broad impacts beyond the particular locality in which they are situated. This includes the siting of power plants and transmission lines, large-scale industrial or commercial facilities, and surface mines. Chapter 4 is concerned with the state role in preserving particularly fragile or valuable natural areas. Three types of legislation are examined: wetlands protection, shoreland and coastal zone management, and critical areas preservation. Finally, chapter 5 provides a summary analysis of diffusion patterns across the full range of statutes, projects the future course of diffusion, and assesses the implications of these findings in relation to the need for further federal initiatives on land use. (Author/MLF)