What is defined as a rule or command that has the force of law?

The definition of a rule or command that has the force of law aligns with an executive order, which is issued by the head of the executive branch, typically the President or a state governor. Executive orders direct the operations of government agencies and manage the enforcement of laws. They have the power to create or modify policies and procedures within the framework of existing laws, making them legally binding.

In contrast, the other options represent different aspects of law. A statute refers to laws enacted by a legislative body, ordinances are local laws passed by municipal governments, and regulations are detailed rules created by governmental agencies based on statutes. While all of these can also hold the force of law, the question specifically pertains to the authoritative command of an executive order, which serves as a direct directive from a leader to execute governmental functions or policies.