Wordpress Hooks and WooCommerce

I'm setting up a WooCommerce interface in our Wordpress site for the purpose of collecting online donations, etc.  We're using Authorize.net as the payment gateway and their compliance guide states that we should have some sort of statement in the checkout process for users to confirm their intentions.  Something along the lines of   "By clicking the button below, I authorize [merchant’s name] to charge my bank account starting on [month, day, year] and on the [day of the month] of each month following through [month, date year] for the amount of [$XX.XX] for [description of the transaction]."

However, the checkout process does not seem to offer anything like that with the Authorize.net plugins out of the box.  How can I integrate this type of verbiage to ensure compliance?  Yes, I could add a "Terms of Service" page, but that wouldn't be in their face nor would it have dynamic/unique info relevant to their transaction like the suggested verbiage articulates.

I checked with WooCommerce support and they just pointed me to "woocommerce_review_order_after_submit" WooCommerce action to add this text.  However, I'm not really experienced with Hooks yet, though I'm anxious to learn.  I suspect this is simple for someone with experience and knowledge in this area, but I'm just not there yet.  Any assistance would be appreciated.