Which of the following must occur when advertising the sale of a vehicle?

In the context of advertising vehicle sales, ensuring that the advertisement includes a specific timeline for the price validity is crucial for maintaining transparency and consumer trust. By specifying how long the advertised price is valid, dealerships can manage customer expectations and reduce the potential for misunderstandings. This practice helps to ensure that consumers are informed about any time limitations regarding promotional pricing, making it clear when the terms of the offer will change. By providing this information, dealerships can foster a more trustworthy relationship with buyers, encouraging informed decision-making.

While other aspects, such as stating the lease price or including contact information, are important for effective advertising and customer engagement, the inclusion of a price validity timeline specifically addresses the potential for confusion around promotional pricing, thereby serving a regulatory function in advertisement ethics and practices.