There is no need to roll any dice for these. This term describes activities which are always successful under normal circumstances.
In Call of Cthulhu your investigator can succeed in three ways: (1) automatic actions, (2) simple percentile rolls, and (3) the resistance table roll. Here's the relevant passage from 3rd Edition: I've already discussed the difference between Keeper's GMing styles and game mechanics/rule systems. Well, 3rd Edition obviously talks about when to roll and when not to roll.
