The answer does depend on exactly how committees have been set up. The typical arrangement is that a committee approves its own minutes at the next meeting of that committee. Their minutes are submitted to the full council in order to report on the committee's activities, but they are not approved by the full council because the committee has that job. By contrast, the minutes of the full council need to be accepted by the full council, and signed as a correct record. The various minutes should be available to councillors and public as supporting documents for the council meeting.