LAW 16: all vows taken on a golf course shall be valid only until the sunset.

定律十六：在球场上的所有誓言只有在太阳落山以后才算数。

youdao

And, the law would "sunset" -- or expire-- five years after the program goes into effect.

CNN: Lawmakers reach tentative deal on prescription drug reimportation

Even without that reality, the law's sunset clause means that Congress has the option to renew the legislation or revise it.

FORBES: Don't Be Afraid To Die In 2011

If the sunset clause in the new tax law has you in a panic that death delayed one day into 2011 could cost heirs millions in restored estate taxes, relax.

FORBES: Magazine Article