maternity or paternity leave of absence means, for Plan Years beginning after December 31, 1984, an absence from work for any period by reason of the Employee's pregnancy, birth of the Employee's child, placement of a child with the Employee in connection with the adoption of such child, or any absence for the purpose of caring for such child for a period immediately following such birth or placement. For this purpose, Hours of Service shall be credited for the computation period in which the absence from work begins, only if credit therefore is necessary to prevent the Employee from incurring a 1-Year Break in Service, or, in any other case, in the immediately following computation period. The Hours of Service credited for a "maternity or paternity leave of absence" shall be those which would normally have been credited but for such absence, or, in any case in which the Administrator is unable to determine such hours normally credited, eight (8) Hours of Service per day. The total Hours of Service required to be credited for a "maternity or paternity leave of absence" shall not exceed 501.