Final answer:
A contract without an ending date can be terminated after one year under laws like BRRETA which govern real estate transactions and agency relationships within that field.
Step-by-step explanation:
When a contract does not contain an ending date, certain laws such as the Broker Real Estate Transaction (BRRETA) in some jurisdictions may determine that the contract should terminate after a certain period, typically one year. This concept is often related to the idea of a 'reasonable' amount of time for agency relationships in real estate.
The exact law governing this can vary by state or country, but typically state real estate laws or regulations will include provisions that limit the duration of these open contracts. In some places, BRRETA stipulates that if a contract does not specify an end date, the duration cannot exceed one year. This prevents indefinite agency relationships and ensures there's a clear understanding of how long the services are to be provided.