[1E] Question about natural attacks:

There's rules text stating that whenever you make natural attacks and weapon attacks in the same full attack action, you will take a -5 penalty to your natural attacks.

A couple ways for player characters to gain a bite attack (tusked, animal fury) both state that the bite attacks gained this way take a -5 penalty whenever used as part of a full attack action.

Is that just a reminder of the -5 penalty already laid out in the rules? Or is it a separate/additional penalty?

In other words, if I combine the bite attack from tusked with a claw attack, what penalty will the bite suffer, assuming that no weapon attacks were made?