Labour law factories act

1.IS REST HOUR OF 30 MIN TO BE INCLUDED IN 8 HRS SHIFT. WE WORK FOR TWO SHIFT OF 8 HRS EACH WITH 6 DAY WORKING. BESIDES GENERAL SHIFT . 2 OVERLAPPING OF 8 HRS SHIFT CAN A WORKER COME BEFORE TO TAKE OVER THE SHIFT I.E 7 AM TO 3 PM SHIFT THE NEXT OPERATOR COMES 15 MIN BEFORE AND THE FIRST OPERATOR LEAVES AT 1500 HRS.IT IS ALLOWABLE.CAN IT BE DOCUMENTED.