From Social Security Ruling 24-3p.; Titles II and XVI: Use of Occupational Information and Vocational Specialist and Vocational Expert Evidence in Disability Determinations and Decisions, due to appear in the Federal Register tomorrow:
... VSs [Vocational Specialists, used at DDS] and VEs [Vocational Experts, used at OHO] may provide evidence based on their professional experience and any reliable source of occupational information that is commonly used in the vocational profession and relevant under our rules. VSs and VEs are in the best position to determine the most appropriate sources of data to support the evidence they offer. We expect VSs and VEs to identify the sources of the data they use and, where applicable, to explain their general approach to estimating job numbers. If the VS or VE uses a data source that defines exertion, education, or skill levels differently than our regulations, we expect the VS or VE to explain the difference. ...
Some sources of occupational data use definitions of exertion level, skill level, and education level that align closely with our program rules. The DOT is such a source. If a VS or VE uses a source that defines exertion, skill, or education level differently than our program rules, we expect the VS or VE to acknowledge the difference and explain whether or how they have accounted for the difference. ...
You can start to see a new occupational information system coming. They're trying to avoid the necessity of changing their regulations. Also, they want to phase it in and they want to have it both ways -- use either the old or the new to deny claims with claimants unable to demand consistency.