Which of the following statements is not accurate regarding effective dates in the Internal Revenue Code?

Which of the following statements is not accurate regarding effective dates in the Internal Revenue Code?

a.        Sections of a new tax law may have different effective dates.

b.        New provisions of the Internal Revenue Code do not always go into effect immediately upon signing of the law by the President.

c.        Some effective dates can precede passage of the act.

d.        All are accurate.