Certainly. Many countries have bilateral copyright treaties which override the Berne Convention (eg there's one between the US and UK which has been there since the 1840s), but I do still believe that all Berne Signatories are required to have a "Life+50" copyright term as a minimum. I may well be wrong, but that is my belief.
As Wiki says:
Quote:
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The Berne Convention states that all works except photographic and cinematographic shall be copyrighted for at least 50 years after the author's death, but parties are free to provide longer terms, as the European Union did with the 1993 Directive on harmonising the term of copyright protection.
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ie, they are free to have longer terms (as the EU has "life+70", for example) but not shorter ones.