SECTION 1. Section 20H of Chapter 233 of the General Laws, as appearing in the 2015 Official Edition, is hereby amended by striking the existing section and replacing it with the following:

Section 20H. If a witness has been granted immunity pursuant to the provisions of section twenty E by a justice of the supreme judicial court, the appeals court, or the superior court, and thereafter refuses to testify or produce evidence after being so ordered by such justice, the attorney general or district attorney shall institute contempt proceedings against such witness in the court where the alleged contempt occurred, and, after hearing or trial, if such witness is adjudged in contempt of court, he shall be punished, if he has attained the age of eighteen, by imprisonment in the state prison or the house of correction for a term not to exceed the maximum penalty for the crime which is the subject of the grand jury investigation or criminal proceeding, or until he complies with the order of the court, whichever occurs first.  A witness who has not attained the age of eighteen shall, if found in contempt, be committed to the Department of Youth Services for a period not to exceed one year,  or until he complies with the order of the court, whichever occurs first.  The rules of practice and procedure relative to criminal appeals as provided by the Massachusetts Rules of Criminal Procedure and the Massachusetts Rules of Appellate Procedure shall apply to appeals under this section.