Which of the following is NOT typically defined in a written brokerage engagement?

In a written brokerage engagement, it is essential to include specific details that define the relationship and the expectations between the broker and the client. Among the elements typically defined are the type of property being bought or sold, the real estate commission structure, and the duration of the agreement. These aspects are crucial for establishing clear terms for the brokerage's services and obligations.

The property's street address, while important for identifying the specific location of the property involved, is not a fundamental aspect that needs to be explicitly stated in all brokerage agreements. The focus of these documents is more on the broad terms of engagement rather than the precise address of a property, which can be part of additional documentation or listings but may not be essential in the initial brokerage engagement itself. Thus, the correct answer highlights an element that is less critical to the foundational elements of the agreement.