Written by two Republican senators, Olympia Snowe of Maine and James Jeffords of Vermont, this provision would bar corporations and unions from financing obvious election broadcast ads - defined as ads that mention the name of a candidate.

The measure would bar unions and corporations from running thinly disguised campaign advertisements within 30 days of a primary or 60 days before a general election.

While 527's have existed for several years, they gained prominence this year after new campaign finance laws barred big donors, unions and corporations from giving unlimited amounts of money to parties.

Tax Loophole Measure Is Thwarted House Republicans prevented a vote on a measure that would bar corporations that use a Bermuda mailbox to avoid paying taxes from holding federal contracts.

Another provision would bar unions and corporations - but not some advocacy groups - from running "issue ads" that mention a candidate 60 days before an election.

The purpose of the scheme was to evade Federal election law limiting to $1,000 the amount that any one person may give to a candidate during an election cycle and barring corporations from making any such contributions at all.

The advertisements could violate Federal election law, which bars corporations from making direct contributions to a candidate's campaign.

(In New York, state law effectively bars publicly traded corporations from acquiring hospitals.)

Congressional negotiators removed from the bill a provision adopted by the Senate that would have barred corporations that have moved to offshore tax havens from competing for military contracts.

But Dolan believed that covenants he signed - which would have created a division between the Jets and his Cablevision assets - provided adequate protection against his corporate power in the N.F.L., which bars corporations from owning teams.