Principle #2: The record keeper is not the boss unless the record keepr is a fiduciary (ask and watch the backpedaling). The determination of eligiblity is a fiduciary matter and the fiduciary must act in the interests of the participant, which may mean no arbitrary restrictions, but reasonable administrative standards are also permitted. If there are administrative restrictions, they should be described in the SPD. Better to have them in the plan document to take pressure off the fiduciary.