Most important are what are referred to as third-generation products. The table at the back of Chapter 12 is quite helpful in remembering the rules. Looking at actual plan documents can be helpful. If you are a participant in a plan you can request a copy of the plan, or maybe you have access to a company's prototype documents. Look at the plan, the summary plan description, and any benefit statements.
Students often fail to study the plan termination material sufficiently.
For example, you are responsible for knowing what a partial termination is, what happens when a company stops making contributions to a profit-sharing plan, and what constitutes an involuntary termination. Review each in the book's glossary. If an individual has the option to receive cash now or later, the amount is taxed currently under constructive receipt. A fully vested contribution made to an irrevokable trust is taxable currently under economic benefit, even if such amount could not be withdrawn until later. The information is easy to read and provides the basic rules.