On July 30, 2019, S&P Global Ratings published a request for comment (RFC) on proposed updates to its methodology “U.S. And Canadian Not-For-Profit Transportation Infrastructure Enterprises: Methodologies And Assumptions,” published March 12, 2018. The proposed updates, in “Request For Comment: Global Not-For-Profit Transportation Infrastructure Enterprises: Methodologies And Assumptions,” would expand the scope of these criteria to issuers globally and add mass transit systems in our definition of transportation infrastructure enterprises (TIEs). This article answers frequently asked questions related to the proposed criteria updates.