With respect to the determination of income tax payable for a corporation, which of the following statements is NOT correct?

A$.$ The federal abatement percentage is reduced when less than $100\%$ of the corporation's income is allocated to a province or territory.

B$.$ The basic federal income tax rate applicable to corporations is $38\%.$

C$.$ Provincial and territorial corporate income tax is based on a flat rate applied to taxable income.

D$.$ Full rate taxable income includes any income that is not eligible for the small business deduction $($SBD$).$