Questão jurídica principal
Whether the late-filed legal opinion should have been admitted as evidence under Article 317 CPC.
Decisão extraída
The opinion was rightly excluded because the party did not show the diligence required to produce it in first instance.
Fundamentação extraída
The disputed foreign-law issue had already been debated below, so the party had to submit its proof there; no showing was made that the opinion could not have been obtained earlier.