; or (ii) the date of the marriage, birth, or adoption or placement for adoption (as the case may be) described in subparagraph (A)(iii). (C) No waiting period If an individual seeks to enroll a dependent during the first 30 days of such a dependent special enrollment period, the coverage of the dependent shall become effective— (i) in the case of marriage, not later than the first day of the first month beginning after the date the completed request for enrollment is received; (ii) in the case of a dependent's birth, as of the date of such birth