§ 18. Conditional pardon; procedure on violation of. If any person who has been discharged from imprisonment, by virtue of any parole, conditional pardon, or conditional commutation of his sentence, shall violate such condition or neglect to perform it, his parole, pardon or commutation shall be void and he shall be remanded to the place of his former imprisonment and there confined for the unexpired term for which he had been sentenced. Determination of the violation of such parole, pardon or commutation and reincarceration therefor shall be had in the manner prescribed in the correction law.