Rules and regulations pertaining to Illinois Medicaid include all EXCEPT:

The correct answer highlights an important aspect of Medicaid regulations. In Illinois, as well as in many other states, federal guidelines prohibit states from imposing fees on customers enrolling in Medicaid. This ensures that access to essential health services is not hindered by financial barriers. Under the Medicaid program, the focus is on providing healthcare coverage to low-income individuals without requiring them to pay any out-of-pocket fees for enrollment. The absence of a fee requirement aligns with Medicaid's goal of making healthcare accessible to vulnerable populations.

In contrast, other options address established practices and rules regarding Medicaid coverage and enrollment. For example, several groups identified must be covered, which is essential for ensuring that key populations receive necessary healthcare services. States do have the flexibility to expand eligibility and benefits, reflecting an effort to adapt to the needs of the populations they serve. Furthermore, Medicaid operates on a year-round enrollment basis, which is crucial for allowing individuals to apply when they need coverage, rather than being restricted to specific enrollment periods.

Overall, understanding that Illinois Medicaid does not permit enrollment fees solidifies the program's commitment to accessibility and comprehensive care.