6.4.2 Is there separation of duties between personnel assigned to the development/test environments and those assigned to the production environment?

What does the separation of duties here mean? Is it in the sense of http://www.sans.edu/research/security-laboratory/article/it-separation-duties or something else? The formulation "between test and production environment" is really confusing me, it looks like they mean that one should have different sysadmins for test and production? Or do they just mean that developers shouldn't have access to production?

thanks.