Final answer:
When a broker and sales agent dispute a commission split, the agent can file a complaint with the Texas Real Estate Commission or pursue legal action against the broker.
Step-by-step explanation:
If a broker and her sales agent have a dispute over the commission split on a sale, the sales agent has the recourse of filing a complaint with the Texas Real Estate Commission or bringing legal action against her broker. Complaining to the seller or the buyer would not be appropriate as they are typically not involved in the agreement between the broker and the sales agent. The Texas Real Estate Commission is responsible for overseeing the conduct and the contractual agreements between brokers and their agents, making it one of the appropriate venues for a complaint. Additionally, if a resolution cannot be found through the Commission, the sales agent may bring legal action against the broker to resolve the dispute in a court of law.