Section 155 of the Principal Act is hereby amended by the insertion after subsection (3) of the following subsections:
"(4) A prisoner's wife's allowance shall, subject to this Chapter, continue to be payable to a woman unless she remarries and in such a case the allowance shall cease as and from her remarriage.
(5) Subject to this Chapter, a woman whose husband, being a prisoner, has been committed in custody to a prison or place of detention for a period of not less than 6 months, shall, for the purposes of this Chapter, continue to be regarded as a prisoner's wife where her marriage has been dissolved, being a dissolution that is recognised as valid in the State.
(6) For the purposes of this Chapter, 'husband' in relation to a woman who has been married more than once, refers only to her last husband and for this purpose that last husband shall be construed as including the man to whom, but for the fact that the marriage has been dissolved, being a dissolution that is recognise