def activation_key_expired(self):
        exp_date = timedelta(days=settings.ACCOUNT_ACTIVATION_DAYS)
        return self.user.date_joined + exp_date <= datetime.now()
Saves the criteria for the customer tax with given id. The criteria are
dataset/ETHPy150Open mozilla/kitsune/kitsune/users/models.py/RegistrationProfile.activation_key_expired--crossover with--dataset/ETHPy150Open diefenbach/django-lfs/lfs/manage/customer_tax/views.py/save_criteria