How do unitary states distribute authority to local governments?

In a unitary state, the central government holds supreme authority, and any power exercised by local governments is delegated rather than inherent. Because these powers are granted by the central authority, they can theoretically be withdrawn at any time.12

Unitary systems distribute authority to local governments through several methods:

• Delegation and Statutes: Central governments typically channel policy decisions downward for implementation. Authority is often transferred via conventional statutes, a process known as devolution, which allows subnational units to manage specific affairs without altering the state's fundamental unitary constitution.12
• Administrative Supervision: Some systems maintain strict central oversight. Historically, this included appointing central agents (such as the French préfet) to supervise local affairs. While many nations have moved toward greater decentralization, the central government often retains the power to define the scope of local functions.3
• Local Autonomy: In practice, many unitary states grant significant autonomy to local units. This may include the right to elect local officials, manage local budgets, or perform specific administrative functions prescribed by law. In some cases, this decentralization is so extensive that the system functions similarly to a federal arrangement, even if it remains unitary in constitutional principle.34

Ultimately, regardless of the degree of independence granted, local governments in a unitary state remain subject to the central authority.1