1. In the event that the death penalty provided in this chapter is held to be unconstitutional, any person convicted of murder in the first degree shall be sentenced by the court to life imprisonment without eligibility for probation, parole, or release except by act of the governor, with the exception that when a specific aggravating circumstance found in a case is held to be unconstitutional or invalid for another reason, the supreme court of Missouri is further authorized to remand the case for resentencing or retrial of the punishment pursuant to subsection 5 of section 565.035.

2. In the event that any death sentence imposed pursuant to this chapter is held to be unconstitutional, the trial court which previously sentenced the defendant to death shall cause the defendant to be brought before the court and shall sentence the defendant to life imprisonment without eligibility for probation, parole, or release except by act of the governor, with the exception that when a specific aggravating circumstance found in a case is held to be inapplicable, unconstitutional or invalid for another reason, the supreme court of Missouri is further authorized to remand the case for retrial of the punishment pursuant to subsection 5 of section 565.035.