Our 26 weeks of paid maternity leave was negotiated in our Enterprise Bargaining Agreement. I daresay that if this proposal goes ahead, the unions will push for the additional 18 weeks leave on top of what we already get. From what I heard on the radio yesterday though, it'll be up to each organisation as to what they want to do, or what is negotiated, so you could end up with 'only' the 18 weeks.