(a) Notwithstanding any provision of this article to the contrary, any person who has been convicted of a sexually violent offense, as defined in section two, article twelve, chapter fifteen of this code, against a victim under the age of twelve years old and thereafter commits and thereafter is convicted of one of the following offenses shall be subject to the following penalties unless another provision of this code authorizes a longer sentence:

(1) For a violation of section three of this article, the penalty shall be imprisonment in a state correctional facility for not less than fifty nor more than one hundred fifty years;

(2) For a violation of section four of this article, the penalty shall be imprisonment in a state correctional facility for not less than thirty nor more than one hundred years;

(3) For a violation of section five of this article, the penalty shall be imprisonment in a state correctional facility for not less than five nor more than twenty-five years;

(4) For a violation of section seven of this article, the penalty shall be imprisonment in a state correctional facility for not less than ten nor more than thirty-five years; and

(5) Notwithstanding the penalty provisions of section eight of this article, a violation of its provisions by a person previously convicted of a sexually violent offense, as defined in section two, article twelve, chapter fifteen of this code, shall be a felony and, the penalty therefor shall be imprisonment in a state correctional facility for not less than three nor more than fifteen years.

(b) Notwithstanding the provisions of section two, article twelve, chapter sixty-two of this code, any person sentenced pursuant to this section shall not be eligible for probation.

(c) Notwithstanding the provisions of section one-a, article eleven-a and section four, article eleven-b of chapter sixty-two of this code, a person sentenced under this section shall not be eligible for home incarceration or an alternative sentence.