I have read a Charter Guide to Chartering aircraft put out by NBAA. Since I've had a couple more glasses wine than I should have I cut and pasted the sites name. Just Google it and you'll see a downloadable version that will answer quite a few questions raised here about older aircraft, chartering aircraft, pilot training etc..... By the way H750, I'll be taking delivery of SN HA001 in a couple weeks. The very first 750.
Google this name then you'll see the download.
NBAA Aircraft Charter Consumer Guide