Section nineteen of the Principal Act is amended--
(a) by omitting paragraph (a) of sub-section (2.) and inserting in its stead the following paragraph:--
"(a) a pension, during her life-time but ceasing upon her re-marriage, at a rate equal to five- twelfths of the rate of the parliamentary allowance to which the deceased person was entitled immediately before he died or became entitled to pension (as the case may be) ; or";
(b) by inserting after sub- section (2.) the following sub-section:--
"(2A . ) Where a widow who has an option under the last preceding sub-section dies or remarries without having exercised that option, she shall be deemed, for the purposes of this Act, to have exercised that option immediately before her death or re - marriage by electing to be paid the amount ascertained in accordance with paragraph (b) of that sub-section.";
(c) by inserting after sub-section (3.) the following sub-section--
"(4.) Where, in accordance with sub-section (2.) or (3.) of this section, an amount of pension received by, or accrued due to, a deceased person before his death is deducted from an amount otherwise payable, the amount the Commonwealth would otherwise be liable to pay under paragraph (c) of section fourteen of this Act in respect of the Commonwealth supplement is reduced by the amount paid or payable into the Fund by the Commonwealth in respect of that amount of pension.".