Final answer:
Legislative bodies, such as the U.S. Congress, may suspend procedural rules by unanimous consent to expedite non-controversial or procedural matters. They also possess the authority to determine their own rules, which can include supermajority requirements for specific actions.
Step-by-step explanation:
Rules that may be suspended by unanimous consent primarily pertain to the procedural and parliamentary rules of a legislative body such as the United States Congress. Unanimous consent is a parliamentary procedure that allows for the quick passage of a resolution without following the standard detailed rules of debate and voting. This process requires the agreement of all present members and is often used to expedite proceedings that are non-controversial or procedural in nature. As mentioned in the provided information, every order, resolution, or vote that requires the concurrence of both the Senate and House of Representatives, aside from questions of adjournment, must be presented to the President for approval. Furthermore, each House has the power to determine the rules of its proceedings. This includes the ability to suspend rules by unanimous consent or, conversely, the requirement of a supermajority vote in situations such as expelling a member or invoking cloture to end a filibuster in the Senate.