(in such form and manner as the Secretary may prescribe) the program under which the descendant is to receive assistance. (2) Aggregate period The aggregate period for which an eligible descendant may receive assistance under this section and chapter 35 of this title may not exceed 48 months (or the part-time equivalent thereof). 1814. Monetary allowance (a) Monetary allowance The Secretary shall pay a monthly allowance under this section to an eligible descendant for any disability resulting from spina bifida suffered by such descendant. (b) Schedule for rating of disabilities (1) In general The amount of the allowance paid to an eligible descendant under this section shall be based on the degree of disability suffered by the descendant, as determined in accordance with such schedule for rating disabilities resulting from spina bifida as the Secretary may prescribe. (2) Levels of disability The Secretary shall, in prescribing the rating schedule for purposes of this section, establish three levels of disability upon which the amount of the allowance provided by this section shall be based. (c) Amount of monthly allowance (1) In general The amounts of the allowance shall be $200 per month for the lowest level of disability prescribed, $700 per month for the intermediate level of disability prescribed, and $1,200 per month for the highest level of disability prescribed. (2) Adjustment Amounts under paragraph (1) are subject to adjustment under section 5312 of this title. II Eligible descendants of women veterans exposed to herbicide agents born with certain birth defects 1821. Eligibility