The Tax Code is actually pretty specific about who has a duty to keep that information confidential.

FORBES: Uh Oh: Bieber Crosses Line But Not The Law On Lohan Tax Remarks

Thus, in a typical analysis, the lawyer is focused on a fact-specific transaction and would analyze each and every duty or obligation imposed by law and determine what must be done to comply and what must be avoided so as not to breach some duty imposed by statute, regulation, common law, or the contractual obligations underlying the transaction itself.

CENTERFORSECURITYPOLICY: Shariah��s Black Box

For a period of 20 years the existing Turkish customs tariff shall remain in force throughout the whole of the blue and red areas, as well as in areas (a) and (b), and no increase in the rates of duty or conversions from ad valorem to specific rates shall be made except by agreement between the two powers.

BBC: Map detailing the Sykes-Picot agreement

In the public sector, specific legal duties in relation to race, disability and gender have now been incorporated into a general public duty, backed by the law.

BBC: UK