If the illegal purchase involves large quantities, the leaf tobacco purchased and the illegal income derived therefrom shall be confiscated.

数量巨大的，没收违法收购的烟叶和违法所得。

youdao

Personal income consists of two sources of legal income and illegal income. The country should protect the personal income and prevent and defeat illegal personal income.

个人收入应划分为合法收入和非法收入两类，国家应保护合法收入，打击和取缔非法收入。

youdao

To protect all the legal income of non-labouring, first of all, we should distinguish the legal income of non-labouring from the illegal income, and figure out the reason.

保护一切合法的非劳动收入，必须正确区分合法的非劳动收入与非法收入的界限，明确其产生的原因。

youdao

Authorities will also step up efforts to track and control illegal income, including from government officials.

WSJ: China to Make State Firms Turn Over More Profits

Tax defiers--or "tax protesters" as they've traditionally been known--glom onto one kooky, discredited theory or another as to why the income tax is illegal or doesn't apply to them personally or doesn't cover their normal sources of income. (Example: Only foreign income, or only earnings of federal employees are taxable.) They typically file returns showing zero income or simply stop filing.

FORBES: Snipes' Sentence A Big Win For Tax Officials

Some economists estimate North Koreans earn more than 50 percent of their income by illegal trade.

CNN: The secret capitalist economy of North Korea