(a) Rewinding of nitrate films shall be performed either in a special rewind room at an approved location, or in the projection room. An approved can for scrap film having a self-closing hinged cover shall be provided.
(b) Nitrate film in any projection room or rewinding room shall be kept as follows:
(1) Up to 40 pounds of film (8,000 feet of 35 mm. film) may be kept in I.C.C. shipping containers, or approved cabinet in each room.
(2) If the amount of film on hand exceeds 40 pounds, an approved cabinet shall be provided, in which the amount of film in excess of 40 pounds shall be kept.