Occupational Base Law and Legal Definition
”The number of occupations, as represented by RFC (Residual Functional Capacity), that an individual is capable of performing. These "base" occupations are unskilled in terms of complexity. The regulations take notice of approximately 2,500 medium, light, and sedentary occupations; 1,600 light and sedentary occupations; and 200 sedentary occupations. Each occupation represents numerous jobs in the national economy. (In individual situations, specific skilled or semiskilled occupations may be added to the base.)” [1983 SSR LEXIS 30 (SSR 1983)]
