From the summary of a change to Social Security's HALLEX manual:
We clarified that an ALJ must obtain concurrence from the Hearing Office Chief Administrative Law Judge (HOCALJ), Regional Chief Administrative Law Judge (RCALJ), and Regional Commissioner (RC) of the appropriate region to request the testimony of a particular FO [Field Office] employee at an appearance. We removed the phrase stating that the RCALJ may waive notification of the request because RCALJ's concurrence is now required.How might this come up? Let's say it's the testimony of a claimant that a particular field office employee, that he can identify by name, told him that he could not file a claim for Social Security benefits and that advice was incorrect and cost the claimant money. The Social Security Act would allow backdating of a claim in this circumstance. Wouldn't the field office employee's testimony be relevant?