Final answer:
In the context of law, when a lawyer represents multiple clients in a single matter, they must explain the implications, disadvantages, and risks of common representation to all clients involved.
Step-by-step explanation:
When representation of multiple clients in a single matter is undertaken, the consultation shall include an explanation of the implications of the common representation and the disadvantages and risks involved. This requirement is important in ensuring that each client is fully aware of potential conflicts of interest and other issues that can arise when a lawyer represents multiple parties simultaneously. The clients need to understand how such representation could affect their interests negatively and the possible legal risks associated with a joint representation scenario.