An accountant called and said that there were new regulations regarding the amount of company stock that is now allowed inside a 401(k) plan. More specifically, the amount that officers can hold. He referenced SEC regulation 16B3. I have not heard of anything new, nor can I find this regulation. Has anyone else come across this issue? Thank you.

I've written a BNA Tax Management Portfolio on this topic. It is #362, Securities Laws Aspects of Employee Benefit Plans. You will find it in most comprehensive tax libraries.