A supplemental driver clause in a car rental agreement allows more than one person to legally operate the rented vehicle. Typically, spouses or domestic partners are automatically authorized, while other individuals may be added for a fee, subject to specific eligibility requirements such as minimum age and possession of a valid driver’s license. For instance, a business traveler might add a colleague to share driving responsibilities on a long trip.
Authorizing an extra driver offers several advantages. It promotes safer driving by reducing fatigue on long journeys, provides flexibility in travel plans, and can be more cost-effective than having each individual rent a separate vehicle. Historically, rental companies have offered this option to address the practical needs of renters and enhance safety on the road. These clauses have evolved over time to reflect changing driving demographics and legal landscapes.