But that requirement meant half the patients in the trial did not qualify for treatment.
This requirement means that charities can only avail of the exemption where the services are directly necessary to their purposes.
"The buy-first provision and the three-year holding requirement means management has skin in the game," Mr. McGurn said.
A higher reserve requirement means less money will be available for loans, which would slow economic growth.
The membership requirement means that several Minneapolis agencies with reputations for well-regarded work — among them, Mono, Olson and Zeus Jones — are sidelined.
The requirement means those applying must have started their news career before Facebook founder Mark Zuckerberg had celebrated his 13th birthday.
A supermajority requirement means that one "no" vote in the legislature counts the same as two "yes" votes.
Making it a requirement means the cost can be factored in for financial aid; it also allows the university to impose uniformity, which makes technical support much simpler.
The speed requirement meant I.B.M.'s Watson had to do its near-instant data digging in memory instead of finding data on hard disks.
The renewable fuel requirement means some of Cool Planet's best prospective customers could even be oil companies, who will be looking for ways to satisfy the rule, Bolsen says.
The postponing of a planned census — another unmet constitutional requirement — means that no one can even agree how many voters each lawmaker should represent or how seats should be apportioned.
