The court's ruling made impossible any appeal within Venezuela, so the opposition decided to seek relief from the regional tribunal. Blyde said the Supreme Court ruling violated democratic rules laid out in the 2001 Inter-American Democratic Charter.
Chavez's government has repeatedly clashed with two regional human rights bodies. It began a process of pulling out of the human rights court in September when it notified the Organization of American States that it was renouncing a regional convention on human rights.
But Blyde noted that the Venezuelan government will continue to be a party to the human rights court for a yearlong period that will end this September.
There was no immediate response from the government about the planned challenge before the regional court. Vice President Nicolas Maduro was visiting Cuba on Saturday, and had said he would be meeting with Chavez's family and medical team.
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