Austria is a signatory of CEDAW with one reservation on article 11 "as far as night work of women and special protection of working women is concerned, within the limits established by national legislation". In the document I didn't find anything written about night work in particular. But I didn't wonder so much about that because we have a quiet good labour union to secure the rights at the working places. I was more upset because it's written in detail that men and women should have the same income for the same work, but this isn't true at all!