The absence from New Zealand of any such contributor as a member of an Expeditionary Force as aforesaid shall not be deemed to be absence from New Zealand within the meaning of section nineteen of the principal Act.

Contributions payable to the fund by or on behalf of any such contributor in respect of the period during which he is so absent from New Zealand and for such period thereafter, not exceeding six months, as the Board may determine shall be reduced to one-half of the contributions that would have been payable by that contributor if this Act had not been passed.

The period of six months referred to in subsection three of section ten of the principal Act shall be deemed to be the period of six months immediately succeeding the expiration of the period referred to in the last preceding paragraph, and the period of eighteen months referred to in subsection six of the said section ten shall be deemed to be the period of eighteen months immediately succeeding the expiration of the said period.