Allure2405,
Sorry to hear about your case. I hope some can be done ressolve the case in your favour.
Please the submission to CIC was it after you receive their mail or after?
Had you known, you could have applied for rehabilitation on behalf of your husband however that can only take place five years after the sentence or fine has been obeyed.
It does appear the only way out of this is wait until the five years is spent.
As you said the offense will be struck off his PCC in 26 Feb. 2010 according to Korean law, I think not. Usually what happens is that the offense will be stepped down but the record is stored in the police data bank. When CIC request for information pertaining to anyone from the national police, they would be informed about this stepped down offenses. Hence you might still need to disclose this offense should you re-apply again or else it could be considered misrepresentation.
I do sincerely feel your pains.