July 30 (Reuters) - Federal Reserve Governor Lael Brainard on Friday laid out a range of reasons for "urgency" around the issue of developing a U.S. central bank digital currency, including the fact that other countries such as China are moving ahead with their own. Reporting by Ann Saphir; Editing by Sandra Maler You have reached your article limit Register for FREE to continue using Reuters.com Free registration gives you access to: Unmatched, global, round-the-clock news Hand-picked insights that are easy to find and use Our Daily Briefing newsletter, delivering the day"s headlines right to your inbox