Which ISAE Report is run over a pre-defined period of time usually six months?

Type 2 Reports are designed to assess the effectiveness of a service organization's controls over a specified period, typically ranging from six months to a year. These reports evaluate not only the design of the controls but also their operating effectiveness during the defined time frame. This aspect is essential for organizations and stakeholders who need assurance that controls are functioning as intended consistently over time.

While Type 1 Reports provide a snapshot of the control environment at a specific point in time, they do not include an evaluation of the controls' effectiveness over any duration. This is a crucial distinction, as Type 2 Reports provide a more comprehensive overview necessary for understanding the ongoing reliability of the controls without potential fluctuations that could impact security and compliance.

Type 3 Reports are not standardly recognized within ISAE 3402, and aged reports typically refer to something entirely different, often related to financial reporting or overdue accounts, making them irrelevant to the context of ISAE reports. Thus, Type 2 Reports are the correct choice, as they affirm the ongoing effectiveness of controls over a specified period, reflecting a level of diligence important for maintaining trust in a service organization's security posture.