Where the defendant has been convicted of, or has entered a plea of guilty to, N.J.S.A. 2C:11-3(a)(1) or N.J.S.A. 2C:11-3(a)(2) and where the provisions of N.J.S.A. 2C:11-3(c) apply, a separate sentencing hearing shall be conducted pursuant to N.J.S.A. 2C:11-3(c) immediately thereafter, except for good cause shown. At the sentencing hearing the jury, or the court if there is no jury, shall complete a special verdict form.