Info
About 2 - 3 years ago Pro Pilot did an article about the flight department. Basically, the requirements for the Corporate Flight Department is the same as the other side of the house. 1000 PIC Turbine, etc. The reason being is that if after 3 years of service (or was it two??), the pilot could transfer over to flying the line.
Somewhere in some box I have a copy of the article. PM if you would like me to find it (may take a while) and send it to you.