What must an active broker maintain for conducting private negotiations and closings?

The requirement for an active broker to maintain certain standards while conducting private negotiations and closings primarily revolves around the physical setup and readiness of their operation. In this context, having stationary construction refers to the idea that the broker should have a stable and appropriate environment, such as an office space, where private negotiations can take place securely and confidentially.

Stationary construction ensures that there is a designated area equipped for conducting business, which can help in maintaining professionalism and confidentiality during negotiations and closings. This space often includes proper facilities for clients which enhances the overall efficiency of the transaction process.

The other options may not directly address the specific need for a secure and dedicated space for negotiations and closings. While having a broker's office could seem similar, stationary construction emphasizes having the necessary physical infrastructure to support effective and private transactions, making it the more accurate choice in this context.