In their 1988 report, The Future of Public Health, the Institutes of Medicine (IOM) defined the three core functions of governmental public health as assessment, policy development, and assurance. The Core Public Health Functions Steering Committee developed the framework for the Essential Services in 1994. This steering committee included representatives from US Public Health Service agencies and other major public health organizations.
Live-work unit simply is a contemporary way of referring to a building that is both the residence and place of business of the proprietor. Certainly the live-work unit doesn't have to be organized in that same way, namely, an apartment on the second story above a storefront or walk-in office.
Live loads: refer to loads that do, or can, change over time, such as people walking around a building (occupancy) or movable objects such as a flower pot on a deck. In addition to live loads, what is known as environmental loads are loads that are created naturally by the environment and include wind, snow, seismic, and lateral soil pressures. Snow Load image courtesy of Wikipedia.