The following shall occur as action by Council:
(b) Should Council determine that there is information or questions not considered by the Commission, it may return the issue to the Commission for reconsideration. The Commission shall meet and issue a recommendation to Council within thirty days of the return date. Within thirty days after Council receives the Commission's reconsidered recommendation, Council shall adopt, deny or modify the recommendation as provided in subsection (a) hereof. This return for reconsideration may be done one time only on a zoning amendment issue.