In some circumstances the GM may rule that a character’s Skills in one area is limited by their lack of skill in another. For example, a character fighting while balancing on a moving surface is limited by their ability to balance themself properly. In these cases the character may not take advantage of any of their ranks in the primary skill that would exceed their ranks in the limiting one.
Example
A smuggler is dueling with a pirate on the deck of a ship on the high seas. The ship is rocking heavily in the waves, and unfortunately for the smuggler they are not able to balance them- selves well enough to fight to their full potential in this environment. Their Combat Style skill, normally rank 3 (+30), is treated as being rank 1 (+10) because that is their Acrobatics skill rank.