Mainboard Rules Chapter 7 Continuing Obligations Part VI [Deleted] Up to 18 May 201619 May 2016 onwards Deleted on 19 May 201619 May 2016. 745 [Rule has been deleted.] Deleted on 19 May 201619 May 2016. 746 [Rule has been deleted.] Deleted on 19 May 201619 May 2016. 747 [Rule has been deleted.] Deleted on 19 May 201619 May 2016.