The US state of South Carolina also wants to allow executions to be carried out to carry out the death penalty.
State governor Henry McMaster wrote on Twitter on Monday that he had signed an amendment to the law.
Up until now, the state had planned to use lethal injection to carry out the death penalty.
However, due to a lack of the lethal preparations necessary for this, there have been no executions in South Carolina in recent years.
The change in the law should now allow those sentenced to death to choose whether they want to die in the electric chair or by shooting if a lethal injection is not available.
Lethal injection as a common method
In the United States as a whole, the death penalty is on the decline.
According to the Death Penalty Information Center, 23 of the 50 states have abolished the death penalty so far, most recently Virginia.
Three other states have suspended the execution of the death penalty.
In states where executions are still going on, lethal injection is the most common method.
However, there are alternatives on paper, including in principle shootings, which, according to the information center, have only occurred in isolated cases in recent US history, most recently in 2010 in the state of Utah.
In 2020, a total of 17 people were executed in the United States by five states and the federal government, according to the center.
The federal government had not carried out the death penalty for almost two decades - but the administration of ex-President Donald Trump enforced their reintroduction.
The new President Joe Biden opposes the death penalty.