I don't know if anything changed, but Brown had language in the flight ops manual that used the phrase "no commercial flying". Was like that for years. If you look at the FAA definition of that, you get "no flying for pay". So, even instructing could be disallowed. Later, rumors were that the companies position was that it meant "no 121 or 135" flying, leaving 91 open. Not sure if anyone pressed to test on this. I did a lot of instruction in the late 90's while at brown thinking it was a gray area but I really didn't give a crap. I'd be wary of management coming out with an LOA to address this. Those that want to do outside flying are probably already doing it on the down low. Once the LOA comes out, some will fess up, ask for permission. Now, the CP's office can say no AND they know who you are. The other argument could be that brown did relax grooming standards and tattoo's a while back and just had did a buyout to the senior guys rather than furlough. So, maybe a kinder and gentler working environment is in the future. Folks at brown could use some of that.