Refund Authorization Mandate

Hi, I'm wondering how Moneris will support the upcoming Visa Refund Authorization Mandate?  

 

This dictates the need for an authorization of all refunds prior to calling for the settlement/capture of this refund.  I know it's been pushed back to April 2019 for all merchants in the US processing less than 10 million in refunds in the last twelve months, but I don't see it listed anywhere on the API or blog posts here and need to know what changes we'd need to make to support the two step refund?