Geoffroy V. HHS
Court gives qualified approval to Grids as valid exercise of Secretary's statutory authority. Secretary may, using Grids, take administrative notice that substantial gainful work existed in the national economy for a person with claimant's impairment, background, age and education. Where a claimant presents a prima facie case of disability-i. e., that he can not engage in his previous type of employment-it is the Secretary's responsibility to establish that the claimant can engage in alternate employment and that such employment exists.