This document discusses the requirements and guidelines for a B-1 visa for temporary business visitors to the US. A B-1 visa allows entry for business purposes but not for labor. The document outlines the basic requirements for a B-1 visa and examines how to determine if a visitor's activities constitute permissible "business" or impermissible "labor." It analyzes a leading court case on this distinction and provides examples of activities that are clearly permissible or potentially problematic under the B-1 rules. The document notes ongoing debate around interpreting these rules and provides strategic advice for using B-1 visas appropriately.