Description, Prescription, Subscription

Corresponding to the Signal-Sign and Proposal-Proposition distinctions is that between Prescription and Description.  Furthermore, while a description can be characterized as 'informative', a prescription can be, more accurately, 'instructive', e. g. recipes, directions, etc. as well as how frequently to take some medication.  So, perhaps a more precise classification of the Kantian 'Imperative' is 'Prescription', because the Laws and Maxims of his doctrine do not merely indicate something to be done, but, further, how it is to be executed, i. e. by following the formulation of a causal relation, in the case of a Hypothetical Imperative, or by applying a test to the latter, as in the case of the Categorical Imperative.  Thus, with justification, his doctrine has often been categorized as 'Prescriptivism'.  However, as is the case with pharmaceutical prescriptions, even a Categorical Imperative is only an inert sequence of words unless it is freely adopted.  In other words, to be efficacious, Kant's Prescription additionally requires a Subscription to it.