What are the criteria for nominating an eminent person to the commission?
According to the context provided, there are two criteria for nominating an eminent person to the commission:

1. One of the eminent persons must be nominated from amongst the persons belonging to the Scheduled Castes, the Scheduled Tribes, Other Backward Classes, Minorities or Women.

2. The eminent person shall be nominated for a period of three years and shall not be eligible for renomination.