code: def time_before_caveat(t):
      '''Return a caveat that specifies that the time that it is checked at
      should be before t.
      :param t is a a UTC date in - use datetime.utcnow, not datetime.now
      '''
  
      return _first_party(COND_TIME_BEFORE,
                          pyrfc3339.generate(t, accept_naive=True,
                                             microseconds=True)f time_before_caveat(t):
      '''Return a caveat that specifies that the time that it is checked at
      should be before t.
      :param t is a a UTC date in - use datetime.utcnow, not datetime.now
      '''
  
      return _first_party(COND_TIME_BEFORE,
                          pyrfc3339.generate(t, accept_naive=True,
                                             microseconds=True))
docs: Return a caveat that specifies that the time that it is checked at
      should be before t.
      :param t is a a UTC date in - use datetime.utcnow, not datetime.now