The Board may adjourn any regular, adjourned regular, specials, or adjourned special meeting to a time and place specified in the order of adjournment. Less than a quorum may so adjourn from time to time. If all members are absent from any regular or adjourned regular meeting, the Clerk of the Board may declare the meeting adjourned to a stated time and place, and he shall cause a written notice of the adjournment to be given in the same manner as provided in Section-2-1.105 of this article for special meetings, unless such notice is waived as provided for special meetings. A copy of the order or notice of adjournment shall be conspicuously posted on or near the door of the Board Chambers or place where the regular, adjourned regular, special, or adjourned special meeting was held within twenty-four (24) hours after the time of adjournment. When a regular or adjourned regular meeting is adjourned as provided in this section, the resulting adjourned regular meeting shall be a regular meeting for all purposes. When an order of adjournment of any meeting fails to state the hour at which the adjourned meeting is to be held, it shall be held at the hour specified for regular meetings. (Rule 3, Ord. 555)