Section 351.520 - Export insurance(a)Benefit -(1) In general. In the case of export insurance, a benefit exists if the premium rates charged are inadequate to cover the long-term operating costs and losses of the program normally over a five-year period.(2)Amount of the benefit. If the Secretary determines under paragraph (a)(1) of this section that premium rates are inadequate, the Secretary normally will calculate the amount of the benefit as the difference between the amount of premiums paid by the firm and the amount received by the firm under the insurance program during the period of investigation or review.(b)Time of receipt of benefit. In the case of export insurance, the Secretary normally will consider the benefit as having been received in the year in which the difference described in paragraph (a)(2) of this section occurs.(c)Allocation of benefit to a particular time period. The Secretary normally will allocate (expense) the benefit from export insurance to the year in which the benefit is considered to have been received under paragraph (b) of this section.