Enda80
Is there some reason why ERISA is of no concern ? In both questions, you only stated the code and treas regs.
I find that, for new people, the best places to start with are the IRS website and Google searches. For example the IRS EP Navigator gives booklets etc covering almost every aspect in a non-technical manner:
http://www.irs.gov/pub/irs-tege/online_navigator.pdfI have heard that Tax Facts is helppful, bit my preference is BNA.
By the way having an incomplete or partial plan document seems somewhat like being only a little pregnant. How do you have a plan if there is no plan document ? What is being sponsored? What was adopted? What sets the rules and benefits etc, if there is no plan document sponsored or adopted ?