Вот например с сайта www.nationalcar.com:
Supplemental Liability Insurance (SLI) ($13.74/Day)
(Where available): If SLI is selected and paid for, Owner provides Renter or any AAD with third party liability protection in an amount equal to the minimum financial responsibility limits applicable to the Vehicle (the Primary Protection). SLI also provides additional third party liability protection, through an excess liability policy, with limits of the difference between the Primary Protection and a combined single limit of $1 million per accident for bodily injury, death and/or property damage to others arising out of the use or operation of the Owner rental Vehicle by Renter or an AAD, subject to the terms and conditions of the policy. SLI includes UM/UIM coverage for bodily injury and property damage in an amount equal to the minimum financial responsibility limits applicable to the Vehicle (the Primary Protection), and additional coverage, through an excess liability policy, with limits for the difference between the statutory minimum underlying limits and $100,000 per accident (for rentals commencing in New York, UM/UIM limits are $100,000 per person/$300,000 per accident; for rentals commencing in Hawaii, the UM/UIM limits are $1,000,000 combined single limit) or state mandated UM/UIM limit, whichever is greater. OWNER AND RENTER REJECT ANY ADDITIONAL UM/UIM COVERAGE TO THE EXTENT PERMITTED BY LAW. SLI, including UM/UIM benefits is provided only when Renter or any AAD are driving the Vehicle. No claim for UM/UIM may be made due to the negligence of the driver of the Vehicle.
То есть, минимум требуемый штатом включен в базу. А купить можно дополнительную страховку до миллиона. АУ Ависа вроде аналогично.
Херц вообще liability не показывает как опцию.
У Payless, да, написано отдельно базовая и отдельно supplemental:
Renter Liability Protection: $19.99 per day If you wish to purchase an optional liability policy that will provide primary coverage, you may purchase Renter Liability Protection (RLP) which provides primary coverage for liability losses up to the California statutory minimum. Exclusions may apply.
Supplemental Liability Protection: $11.99 per day Supplemental Liability Protection (SLP) - is an optional excess auto liability insurance policy that provides a combined single limit coverage of $1 Million per occurrence. Exclusions may apply.
Но с учётом того, что Нэшнал и Херц показали базовую цену включая налоги $215 в день, а Payless - $70, разница все равно окупается Авис и Энтерпрайз - посередине.