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.
The vocational guidelines for Social Security disability define work activity as medium, light, or sedentary. This is how these work activity levels are defined. Sedentary work means that you are able to sit for up to 6 hours in an 8 hour day and lift up to 10 lbs. occasionally during a day; Light work means that you can stand and walk for up to 6 hours in an 8 hour day and lift 10 lbs. frequently and 20 lbs. occasionally