The retirement of Howard Stringer from the board of Time Inc. came about because the board apparently has a mandatory retirement age of 75 years old.

The former chairman of Sony who was on the original board when Time was spun off from Time Warner in 2014, turned 75 this year.

The newest board member nominee is Chegg Inc. CEO David Rosensweig, who is 55 years old, while the onetime independent director John Fahey, 65, will now be inside as non-executive chairman, replacing Joe Ripp, the CEO-turned-executive chairman who is also retiring.