Which of the following is a requirement for a real estate brokerage partnership?

In a real estate brokerage partnership, it is essential that only one partner must be licensed as a broker. This is because, in many jurisdictions, the law stipulates that a real estate brokerage firm must have at least one licensed broker to legally conduct business. This licensed broker will typically be responsible for overseeing all activities of the brokerage and ensuring compliance with relevant laws and regulations.

The other aspects mentioned in the incorrect options don’t align with standard requirements. For instance, it is not necessary for all partners to register under the partnership name directly in the same way or for all partners to be active sales associates. Also, there are no regulations that specify a minimum number of partners for a real estate brokerage, as it can operate with just one broker or a few partners, depending on the state's laws. Thus, having one licensed broker as a partner is both a common and legal necessity in the formation of a real estate brokerage partnership.