Except as provided in subsection (b) of this section, with respect to unemployment that occurs during an additional benefit period, a former servicemember who is eligible under this subtitle: is entitled to a total amount of additional benefits not exceeding 13 times the former servicemember’s weekly benefit amount; and for each week for which additional benefits are payable, is entitled to allowances for dependents in addition to the additional benefits. A former servicemember’s entitlement to additional benefits ceases after having received a total of 26 times the former servicemember’s weekly benefit amount in any combination of UCX or additional benefits.