As the NFL 's eligibility rule passes all three requirements of the Mackey test the restraint qualifies as a nonstatutory labor exemption to the antitrust laws and is therefore legal .
The Mackey test is an application ofJustice White'sJewel Tea formulation .
As the NFL 's eligibility rule passes all three requirements of the Mackey test , which is an application ofJustice White'sJewel Tea formulation , the restraint qualifies as a nonstatutory labor exemption to the antitrust laws and is therefore legal .