Hi!

Here is a cut and paste from the Academy's website. The doc that I shot (TWIN TOWERS) did a seven day theatrical release in LA.

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To be eligible for 91st Academy Awards consideration, a documentary feature must complete both a seven-day theatrical release in Los Angeles County and a seven-day theatrical release in the City of New York during the eligibility period.
OR
2. The film must have won a qualifying award at a competitive film festival, as specified in the Documentary Feature Qualifying Festival List, regardless of any prior public exhibition or distribution by nontheatrical means. Proof of the award must be submitted with the entry. The Documentary Feature Qualifying Festival List is available at www.oscars.org or may be obtained from the Academy.

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Hope that helps!