Nexus issues : legislative hearing on H.R. 2315, the "Mobile Workforce State Income Tax Simplification Act of 2015;" H.R. 1643, the "Digital Goods and Services Tax Fairness Act of 2015;" and H.R. 2584, the "Business Activity Tax Simplification Act of 2015" : hearing before the Subcommittee on Regulatory Reform, Commercial and Antitrust Law of the Committee on the Judiciary, House of Representatives, One Hundred Fourteenth Congress, first session, June 2, 2015.