Final answer:
In cooperative federalism, a strict separation of powers between federal and state governments is NOT characteristic; instead, it involves collaboration, shared responsibilities, and flexible interactions.
Step-by-step explanation:
The characteristic of standard operating procedure of cooperative federalism today that does NOT describe it is the 'strict separation of powers between federal and state governments'. Cooperative federalism is known for collaboration between federal and state governments, shared responsibilities and funding for programs, and flexible and dynamic interaction between levels of government. Unlike dual federalism, where a clear delineation of authority and programs exists, cooperative federalism blends these lines, which can sometimes lead to shared policy areas and mutual dependency, resembling a marble-cake pattern of governance. A strict separation of powers does not align with the cooperative nature of this form of federalism.