How long for does a waiver for the heart take?

I had an ASD Atrial Septal Defect as a kid and got surgery for it Almost 20 years ago. When I went to MEPs it got flagged and I was told I needed a waiver. I had an appointment scheduled for an echocardiogram and finished it 2 weeks ago, the doc said my heart had no problems. A few days after I got a call saying they faxed the results to MEPs.

I was just wondering how long waivers take until they contact you back to sign and do the oath taking?