I've yet to get a definitive answer as to whether you can use a tag more than once in a year. Lots of opinions ("it stands to reason that blah blah blah") for both possibilities:
only-one-use-per-year, or
as-many-times-a-year-as-you-want-but-only-one-use-at-a-time,
but no one seems to know the facts.
An example of a team using two tags in one playing year would put this question to rest right away. Anyone know of such a case?