The legal theory that laws should be made by a sovereign, and that by its definition law is the command of a sovereign, no one/thing else. The main exponant of the theory is Austin, although as a theory the imperative theory of law has been widely discredited, most notably by Hart. See article linked to below for further information:
http://lawmatters.in/content/austin%E2%80%99s-imperative-theory-of-law-173
command of sovereign sanctioned by punishments is law by imperative theory and law as legal science of norms is by pure theory of law.
The categorical imperative theory was developed by German philosopher Immanuel Kant in his work "Groundwork of the Metaphysic of Morals." The theory is a moral principle that states one should act according to rules that could be universal laws.
The first formulation of Kant's categorical imperative "Act only according to that maxim whereby you can at the same time will that it should become a universal law."
A theory, when proven over time, can become a law. Example: Law of Gravity and Theory of Evolution
No, Kant did
Pure Theory of Law was created in 1934.
Immanuel Kant's theory is known as Kantianism, which emphasizes the importance of reason, morality, and human dignity. His ethical theory, deontology, argues that actions should be judged based on whether they are morally right, regardless of the consequences. Kant also introduced the idea of the categorical imperative, a universal moral law that guides ethical decision-making.
A law is a description of a naturally occurring phenomenon, whereas a theory attempts to explain a law.
A law cannot become a theory, as laws are higher in scientific hierarchy than theories. Theories may become laws when the evidence for their factuality proves that the theory meets all established requirements set forth by the theory. If at any point in the scientific method a theory is disproven for the criteria that it sets forth, it can never be considered a Law. The hierarchy is thusly: Hypothesis < Theory < Law.
It was a law not the theory because this principle has also proved by him.
A theory explains how something works - a "law" is just a thumb nail description of a theory.
Ozone depletion is a theory. It is not a law because it is not passed to government.