You can set the default T&Cs on the website. Upon creating any offers, you can add any additional terms on the app- if need be.
OpenRice will also have a standard format that will be included in the Booking and Offers T&C
Go to Settings > Terms & Conditions
You'll have the option to add any additional Booking or Offer T&Cs.
Once these are set, they will be displayed on the app by default.