(a) If the Mayor approves any vote of the Board of Aldermen the Mayor shall sign the same. If the Mayor does not approve the vote, he or she shall within 10 days veto and return the vote for a revote with his or her objections in writing to the Clerk of the Board of Aldermen. If seven aldermen vote in favor of the same, it shall be valid and take effect notwithstanding the objections of the Mayor.

(b) If it is not returned for a revote within 10 days by the Mayor to the Clerk of the Board of Aldermen, then the same shall be valid and take effect without the Mayor's approval.