For many taxpayers using any kind of outside management, the only material participation test available is the 500 hour test - the other tests will not apply. (biggerpockets.com)
Then, they go on for three more pages explaining in minute detail what material participation means. (creatingapassiveincome.com)
The participation of limited partners in enterprises owned by them is passive participation unless they pass material participation tests one, five or six. (millionairemob.com)