IELTS should be valid at the time you submit your documents and application post the ITA. Currently the score are hovering around 440 mark.
e.g. if you receive an ITA by the next draw, check if you will be in a position, to submit all the documents which includes, Letter of reference (work exp doc), PoF, police reports, travel history, medical etc...
If you will not be able to submit it, I would suggest you to redo your IELTS and since the score may change you will end up having a +ve or a -ve impact on your overall score...