The Executive Declaratory Act COANA # 18/2013 was published in the Federal Gazette on 6/21/2013. Vessels intended for the following activities are automatically subject to the temporary admission regime, released from the formalities required by the customs control (I) activities of scientific investigation and research, in the continental shelf and in waters under Brazilian jurisdiction, authorized by the Brazilian Navy, under the Decree no. 96000, of 1988; (II) fishing, with authorization to operate in the Brazilian fishing zones, under the Decree no. 4810, of August 19, 2003; and (III) cruise trips along the Brazilian coast, calling at national ports, or cabotage, under the specific regulation.
RFB Normative Instruction # 1361/2013 - http://www.receita.fazenda.gov.br/Legislacao/ins/2013/in13612013.htm