In modern society, law is the written, authentic, public system of rights and sanctions enforceable by the state. In earlier forms of society, law was not written, and the enforcing institution was not the state. In science, law is the expression of regularity in phenomena.
So, the economic law is necessary, steady, cause-effect relation between the phenomena and processes of an economic life of a society.
Variety of economic laws forms the system of laws in which structure usually distinguish the general, especial and specific economic laws.
The generaleconomic laws are laws which operate in all modes of production and stages of historical development of a society. For example: the law of steady growth of labour productivity, the law of economy of time, the law of advancing growth of needs in relation to possibilities of their satisfaction, etc.
Especial economic laws are laws which operate within several modes of production or stages of social and economic development. For example laws of commodity production, in particular, the Law of value.
Specific economic laws are the laws which operate only in one mode of production or one stage of evolution of a society. For example, the surplus value law, the law of average profit, etc.