In chapter 220.127.116.11 I read the two paragraphs:
"Where there is confusion between trait and state the more general purpose element state should be used even for unchanging characteristics. If you wish to distinguish between characteristics that are generally perceived to be time-bound states and those assumed to be fixed traits, then trait is available for the more static of these. The state element encodes characteristics which are sometimes assumed to change, often at specific times or over a date range, whereas the trait elements are used to record characteristics, such as eye-colour, which are less subject to change. Traits are typically, but not necessarily, independent of the volition or action of the holder."
"This element can be used to extend the range of descriptive information available in the same way as the trait element, using the same content model. However, if there is any confusion over whether something is a state or a trait, then the more general purpose state element should be used as almost all traits are time-bound in a general sense. state may be used for both time-bound and generally unchanging characteristics, but if you wish to distinguish between these then trait is available for the more static of these. Traits are typically, but not necessarily, independent of the volition or action of the holder."
First, I think that those two passages are quite redundant and one could be deleted when there is an appropriate reference to the other passage.
Second, I am confused by the second paragraph's wording "...as almost all traits are time-bound...". My understanding (as a non-native) was, that states were time-bound (if one wants to make that distinction)?!