Much in the same way as the initial proposal was considered by your creditors, they will now consider and vote on whether to accept your proposed variation. On the day your IP should contact you and tell you which way it has gone.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014
Hi I had a variation meeting yesterday all because of my change of income and all went ahead and got accepted. I personally called Creditfix a few hours later for the answers but today they emailed me confirming they accepted and the paperwork to go with it.