Can this seat be installed using a 3 point seatbelt and no tether forward facing ?

Hi Victoria, thank you for inquiry, you can install a Diono with a 3 point seat belt, and you do not have to use a tether forward facing unless there is one there to use, however, please contact your local store if you have any other questions or if you are installing this with a lap belt in the middle seat. We hope this helps. ?For further information on this or any of our other products available, if you follow the link https://www.babyonthemove.co.nz/store-locations/ this will take you to our online store finder. Here you can find contact details for your nearest Baby On The Move Store where one of our team experts will be happy to assist you in your product search and help answer any further questions you may have. We hope this has helped with your query.