Final answer:
An E6 may require a special report for a promotion selection board after performing duty at a new command for a certain number of months without receiving an observed report. The number of months is not specified in the question, and 29517 likely refers to a regulation or document number.
Step-by-step explanation:
In the context of military promotions, an E6 may receive a special report for a promotion selection board if they have performed duty at a new command for at least a certain number of months and have not yet received an observed report. However, without a specific guideline given in the question regarding the required number of months, an accurate time frame cannot be provided. In general, special reports can be used to document significant changes in performance, responsibilities, or duty stations that might affect an individual's promotion consideration.
The term '29517' could reference a document or regulation number, but without additional context or clarification, it is challenging to provide a detailed answer regarding this number. In any such situation, military personnel should refer to their branch's specific regulations or consult their chain of command to get clarification on the appropriate procedures related to promotions, and the official records that must be maintained, such as the 'Record of Promotions, reductions, transfers, casualties, etc., during active service'.