GMAT Sentence Correction (SC) | In many nations, criminal law does not apply to corporations, but in t

Himikemcgarry ,
I have no objection with the correct answer.
However,can you please elaborate more on the shift of tense in option (A).
IMHO,the second part after "but" explains the condition of criminal law.If this condition is met,something happens.
Why the tense are not all in present tense in this part?

Thanks