I presume you are asking about para 5.4.1.2.1.2 a), b) and c).
Although the text is very slightly ambiguous, common sense would suggest that as these are separation minima, whatever distance there is between the aircraft immediately after the separation is achieved will be greater than the minimum. Therefore, in each case that you ask about, the aircraft must be going away from the fix or intersection that is used to establish the separation. Note that the diagrams all show the aircraft heading away from the fix.
If the aircraft are flying to the fix or intersection you would have to achieve vertical or longitudinal separation from the point at which lateral separation no longer exists.