Gst rate on contracted caterers

What's the rate for contracted caterers for supplying food at office canteen after the notification no. 20/2019 - central tax (rate) dt 30/9/2019.

Whether it's charge 5% without ITC or 18% with ITC ?

Is it covers under the "restaurant service" as per the explanation given under notification no. 20/2019.

Thanks 🙏