The phrase "levels of approval" is correct and can be used in written English.
You can use it when referring to the process of getting approval from multiple people or entities in order to achieve a goal. For example: "The project requires three levels of approval before we can move forward."
We don't have so many levels of approval to go through.
The deal must go through two levels of approval: first the state attorney general's office and then the F.C.C.
The audit found that 1 in 10 of the purchases reviewed had skipped multiple levels of approval required by department rules.
So it should come as no surprise that research (from the Resolution Foundation) shows that overall levels of "approval" for the government have fallen to 25% among women, 8% lower than for men.
There are several levels of approval that must be met, first by the D.N.C., and any plan going forward would be overseen by a commission Ms. Thurman plans to appoint.
Public opinion likewise falls in line and the prime minister and other civilian and military leaders receive levels of approval in the polls they could only dream of during peacetime.
There were no middlemen, no multiple levels of approvals, and no focus group research.
"So far, I have spent half my time waiting for three levels of approvals to have it fixed, even though it is completely dysfunctional.
"There was just so much bureaucracy, so many levels of approvals, that nobody seemed to be able to make a decision and get things done," said Manly Barton, president of the Jackson County Board of Supervisors.
And when giving business to an outfit run by former employees who have quit IBM within a year, you need to take three levels of approvals," another person familiar with the developments said.
Farmers have to go through multiple levels of approvals to do basic hiring, and in Georgia, where they have cracked down on illegal farm-workers, farm owners are experiencing severe labor shortages.
