(l) The appointing authority shall consider the list pr'epared by the committee along with other documents received from the committee and unless it consider any change necessary approved the list.
(2) If the' appointing authority considers it necessary to make. any change in the list received from the committee, he shall inform. the committee of the changes proposed and after taking into account the comments, if any, of the committee may approve the list finally with such .modification if any, as may in the opinion be just and proper.
(3) The list as finally approved by the appointing authority shall form .
the select list for promotion of the members of service from the posts mentioned in column 2 of Schedule IV to the posts mentioned in column .
(3) of said schedule.
(4) The select list shall ordinarily be in force for one year or until it is reviewed or revised in accordance with sub-rule (4) of rule 17 but its validity shall not be extended beyond a total period of 18 months from the date of its preparation:
Provided that, in the event of grave lapse in the conduct of performance of duties on the part of any person included in the select list a special . review of the select list may be made at the instance of the appointing authority and the departmental promotion a committee may if it thinks fit remove the name of such person from the select list.