It really depends on the doc - I was told at my consultation that if I was up even 1 pound at my final weigh-in (one week before surgery) they would reschedule my surgery. So of course I promptly gained 5 lbs and then stressed about making my weight for a month. It came off, but I wish I had been able to have a last splurge before weigh-in!
Don't worry though - I don't think most facilities have this requirement, and I'm sure they would have made it clear to you at your consultation. I say enjoy a last hurrah!