And two years ago it prohibited local taxation of direct-to-home satellite TV services.

FORBES: Fact and Comment

While it is appropriate to scrutinize the validity of transactions between related parties, we see no reason why shareholders in two related S corporations should be prohibited from taking distributions of assets from one of their S corporations and investing those assets into another of their S corporations, in order to increase their bases in the latter.

FORBES: The Top Ten Tax Cases Of 2012, #5: S Corporation Shareholders Get A Mulligan For Sloppy Tax Planning

Tennis complies with the World Anti-Doping Authority's code, which recommends a two-year ban for possession of prohibited substances.

CNN: U.S. player faces ban for importing HGH

Two years ago, Delaware Gov. Jack Markell pushed a new law to overcome state privacy laws that prohibited data sharing.

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Two years ago Congress, in a provision of the Balanced Budget Act known as Section 4507, in effect, prohibited doctors from treating Medicare-eligible patients outside the Medicare system.

FORBES: Fact and Comment