When arranging an interchange transaction, which entity cannot disclose information to unconnected PSEs?

In the context of an interchange transaction, it's essential to understand the roles and information-sharing protocols of different entities involved in the operation of the power grid. A Balancing Authority (BA) is responsible for maintaining the balance of supply and demand within its area, while the Reliability Coordinator oversees the reliability of the grid across multiple BAs.

The correct understanding of who can or cannot disclose information is rooted in the confidentiality and regulatory framework that governs power system operations. Any unrelated PSE (Public Service Entity) does not have the position or authority to access or share sensitive information pertaining to specific interchange transactions. This is primarily due to privacy, regulatory compliance, and operational integrity, which require that transaction details remain confidential to those directly involved in the transaction.

In contrast, both the sink and initiating BAs have the right and need to communicate certain information among themselves as part of the transaction process. Similarly, the Reliability Coordinator is tasked with monitoring and coordinating actions across multiple BAs and, as such, is privy to necessary operational information that may need to be disseminated for reliability purposes.

By asserting that any unrelated PSE cannot disclose information, it highlights the importance of maintaining confidentiality in sensitive operations and ensuring that only connected and relevant parties are involved in the information exchange related