This extends the cover provided by the policy to immediate family members named on the policy schedule, and enables them to rent vehicles independently without the lead named insured driver accompanying them. Immediate family members are defined as Mother, Father, Brother, Sister, Daughter, Son, Foster Child, Husband, Wife, Step-parent, Step-child, Step-sister, Step-brother, Parent-in-law, Son-in-law, Daughter-in-law, Sister-in-law, Brother-in-law or co habiting partner.