410.213—Duration of entitlement; child.
(a)
An individual is entitled to benefits as a child for each month beginning with the first month in which all of the conditions of entitlement prescribed in § 410.212 are satisfied.
(b)
The last month for which such individual is entitled to or may be paid such benefit is the month before the month in which any one of the following events first occurs:
(ii)
Is not a student (as defined in § 410.370) during any part of the month in which he attains age 18;
(ii)
The month in which he attains age 23 and is not under a disability at that time (but see § 410.370(c)(4) for an exception);
(5)
If the child's entitlement is based on disability, the first month in no part of which such individual is under a disability;
(6)
A widow's benefit payment, which was ended because of marriage, is resumed following termination of such marriage. (See § 410.211(a) ). (In the month before the month in which a widow marries, payment of benefits to her ends and non-payment of such benefits continues for the duration of the marriage. Thereafter, if her remarriage ends, subject to the provisions of § 410.211 her benefit payments may be resumed. Should such widow again remarry or die, payment of benefits to such child, if he is otherwise entitled, will be resumed effective with the month of such remarriage or death. In such event no action by or on behalf of such child is required for resumption of payment.)
(c)
A child whose entitlement to benefits terminated with the month before the month in which he attained age 18, or later, may thereafter (provided he is not married) again become entitled to such benefits upon filing application for such reentitlement, beginning with the first month in which he files such application in or after such termination and in which he is a student and has not attained the age of 23.