Cloning technology exists in the Sparks Nevada, Marshal on Mars universe.
Clones have been considered people and had full rights for over ten years.
In Free Kicks, it is said after Cactoid Jim dismanteled Punishment Soccer on the Earth's Moon, all the children who were killed during Punishment Soccer were cloned.
There are clones on Mars, some of whom are farmers who live outside Town. (Space-iversary) The band The Jonathan Coultons are clones which appear in TAH #234, Still Alive.