Generally, if your sponsor is a TEI-D, he or she must enroll in a FEDVIP dental plan in order to cover TEI family members. As an exception, however, a TEI family member can accept the responsibility to self-certify and enroll in a FEDVIP dental plan as a TEI certifying family member, and cover other TEI family members, if the sponsor who is a TEI-D (eligible for FEDVIP dental benefits) is not enrolled and the sponsor meets at least one of the following conditions identified in § 894.309(a)(3) (iii):
5 C.F.R. §894.811