The Benefits Review Plan in PRINCE2 does not typically involve defining the period over which the cost-benefit analysis will be based. Its main purposes are to describe how and when the benefits of the project will be measured, including the scope, timing, and responsibility for the benefit reviews post-project closure.
References: PRINCE2 Foundation official guide and study material.

In PRINCE2, baselines are used to establish a reference point for the agreed state of products, against which actual progress can be compared and managed. By requesting a report to check for conflicts between the agreed and actual states of products, the project manager is effectively applying the concept of baselines within issue management. This helps in identifying deviations from the agreed deliverables and initiating corrective actions to address these discrepancies.References: (PRINCE2 7 Foundation Handbook, AXELOS)

According to PRINCE2, the business justification, or the continued viability of the project, must be reviewed continually throughout each stage of the project. This ensures that the project remains aligned with business needs and objectives and that it is still worth pursuing in light of any developments or changes that may occur. References: PRINCE2 7 Foundation Handbook and official training materials.

During the Closing a Project process in PRINCE2, the ownership of the project's products is formally transferred to the customer, ensuring that all deliverables have been accepted and are ready for operational use. This transfer marks the formal completion of the project. References: PRINCE2 Foundation official study guide and materials.

Time-driven controls in PRINCE2 are specifically designed to monitor the progress of Work Packages and management stages at regular intervals. These controls ensure that the project stays on schedule and that any deviations are identified and managed promptly. References: PRINCE2 Foundation official study materials.