Which of the following is not a government requirement when starting a sole proprietorship?

Which of the following is not a government requirement when starting a sole proprietorship? To give clients 90 days notice prior to shutting down operations. A sole proprietorship is when one person solely owns the business and there is no separation and they record all profits and losses through themselves. A sole proprietorship is also the simplest form of business a person  own and operate. 

For the U.S. 2019 budget:

Deficit: keeping deficit between 4.1 and 4.7 percent of GDP.

Debt: debt will continue to grow steadily, but it should be no more than 93 percent of GDP by 2029.

Government revenue: federal government revenue should be 16.5 percent of  GDP.

Spending: Federal outlays should sit at 20.8 percent of GDP.

Economic performance: Real GDP should grow by 2.3 percent of GDP.