"exact basis" is a correct phrase in written English.
You can use it when you need to refer to a precise base or foundation for something, such as a law, theory, or principle. For example: "The exact basis for this policy is described in the official document."
The exact basis of the administration's opposition is unclear.
Officials would not detail the exact basis for that concern, but a senior F.B.I. official said: "There were things in the intelligence that pointed us in that direction.
I was here for a full 15 months before officials and/or ministers deigned to explain the exact basis upon which I would be paid.
This mechanism, she said, "is the exact basis of the geoengineering proposal as a solution to global warming in which President Obama has expressed interest".
While people seeking asylum must show that they would face persecution if they returned to their homeland, the exact basis of Ms. Onyango's claim, and the judge's decision, remained private.
"The asylum process is confidential, and she wants to keep it that way, so we can't get into details on why the judge granted asylum or the exact basis for her claim," Scott Bratton, one of her lawyers, told reporters in Cleveland on Monday, according to The Associated Press.
Exact molecular basis underlying H3 distal sequence recognition calls for complex structure determination in the future.
However, the exact biological basis of aromatherapy massage is poorly understood.
The concrete connection between analogical function and its exact neural basis established in this paper can help us better understand the brain function.
The projective nonnegative matrix factorization (PNMF) method is developed to exact the basis vectors, and the augmented Lagrangian multipliers (ALM) method is proposed to solve the proposed PNMF model.
But, consider that of the 4,000 diseases for which we have the exact molecular basis, only 250 have treatments available.
