What do we call a rule? Consider this example:
33). B moves about according to rules which A gives him. B is supplied with the following table:

a
b
c
d

A gives an order made up of the letters in the table, say: “a a c a d d d”. B looks up the arrow corresponding to each letter of the order and moves accordingly; in our example thus:

→

↑

→

↓
↓
↓

The table 33) we should call a rule (or else “the expression of a rule”. Why I give these synonymous expressions will appear later.) We shan't be inclined to call the sentence “a a c a d d d” itself a rule. It is of course the description of the way B has to take. On the other hand, such a description would under certain circumstances be called a rule, e.g., in the following case:
34). B is to draw various ornamental

Ts-310,30

30.

34). B is to draw various ornamental linear designs. Each design is a repetition of one element which A gives him. Thus if A gives the order “c a d a”, B draws a line thus:

(2015–) Wittgenstein Source Bergen Nachlass Edition (WS-BNE). Edited by the Wittgenstein Archives at the University of Bergen under the direction of Alois Pichler. In: Wittgenstein Source, curated by Alois Pichler (2009–) and Joseph Wang-Kathrein (2020–). (N) Bergen: WAB.