SAO PAULO, Aug 18 (Reuters) - A unit of Brazilian

competition authority CADE has formally suggested a full-blown

investigation into the signatories of Brazil's "Soy Moratorium

Program," a voluntary initiative under which exporters agree not

buy soy from farmers who cleared land in the Amazon rainforest

after July of 2008.

According to a document signed by CADE's General

Superintendent Alexandre Barreto de Souza on Monday and seen by

Reuters, he has also determined the application of a "preventive

measure" and the imposition of fines on the working group that

coordinates the soy moratorium program and the soy exporting

companies which are signatories.