; (II) the date on which it is reasonably feasible, as determined under regulations prescribed by the Secretary, for the child to initiate or resume the use of benefits; or (III) the date on which the child attains the age of 26 years. (iv) The length of the period specified in this clause for the use of benefits by a child under clause (i) is the length equal to the length of the period that— (I) begins on the date on which the child begins acting as the primary provider of personal care services for the veteran or member concerned as described in clause (i); and (II) ends on the later of— (aa) the date on which the child ceases acting as the primary provider of personal care services for the veteran or member as described in clause (i); or (bb) the date on which it is reasonably feasible, as so determined, for the child to initiate or resume the use of benefits. (6) The purposes for which a dependent to whom entitlement is transferred under this section may use such entitlement shall include the pursuit and completion of the requirements of a secondary school diploma (or equivalency certificate). (7) The administrative provisions of this chapter shall apply to the use of entitlement transferred under this section, except that the dependent to whom the entitlement is transferred shall be treated as the eligible individual for purposes of such provisions. (i) Overpayment In the event of an overpayment of educational assistance with respect to a dependent to whom entitlement is transferred under this section, the dependent and the individual making the transfer shall be jointly and severally liable to the United States for the amount of the overpayment for purposes of section 3685 of this title. (j) Regulations (1) The Secretary shall prescribe regulations to carry out this section. (2) Such regulations shall specify— (A) the manner of authorizing the transfer of entitlements under this section; (B) the eligibility criteria in accordance with subsection (b)