Under Brazil's federal constitution of 1988, the states of the federation and the federal district are entitled to establish tax on the "circulation of merchandise, on interstate and inter-municipal transportation services, and on communication services". The states' powers over this value-added tax, or Imposto sobre Operações relativas à Circulação de Mercadorias e Prestação de Serviços de Transporte Interestadual e Intermunicipal e de Comunicação (ICMS), are not unlimited, however. One limitation is found in article 155 §2 (XII) (g), which provides that a specific type of federal legislation known as a complementary law is required to grant ICMS exemptions and other benefits.
September 11 2011