Civil action (contract) whose content is illegal is absolutely invalid in our present legal provisions.

在我国目前的法律规定中，内容违法的民事行为(合同)被绝对地认定为无效。

youdao

He said he and U.S.President Barack Obama agree that whatever new government emerges will have to make a new contract with the international community and its neighbors to build its army, take tough action on corruption, create a more inclusive political process, reach out to moderate elements of the insurgency and stronger control of local affairs.

VOA: standard.2009.10.14

Honest services fraud evolved from a 1941 Supreme Court decision in which a public official received bribes in exchange for favorable action on a city contract.

FORBES: Magazine Article

If there are indeed such links, then the foreign ownership of PTNNT is raised to an unacceptable 51%, and Newmont may face a legal action for violating its contract.

FORBES: Newmont Shines Up To $78 Despite Indonesian Probe

More important, the costs of the transactions that did take place would be exorbitant, since you'd have to do enormous work to investigate each deal and you'd have to rely on the threat of legal action to enforce every contract.

FORBES: A Virtuous Cycle