Just in:
Received this in an email from the pass bureau (paraphrased)
"Employees can't use their non-rev pass bennies to travel for any personal business, side business or any business reason outside of XJT. This includes, but is not limited to, travel related to at house sales ventures such as Mary Kay, job interviews at other companies (!?), etc."

So how am I supposed to get to my sister's Mary Kay party in Des Moines?