Order 41, rule 3 of the Tasmanian Rules of Court does not confer a general discretion to exclude affidavit hearsay evidence on interlocutory applications; the word 'may' permits admission of compliant hearsay but does not authorise exclusion on grounds of unfairness or interests of justice. Hearsay upon hearsay is admissible on interlocutory applications provided the sources and grounds of information and belief are stated, and the source material need not itself be admissible. What constitutes sufficient disclosure of sources and grounds depends on the circumstances of the case.
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