7.2.19. Ventilation of rooms: Unrefrigerated work rooms and sanitary rooms must be equipped with an adequate ventilation system ensuring air renewal as follows:(a) 5 times per hour in the case of dismembering plants contemplated in sections 7.2.4 and 7.2.6;
(b) once per hour in the case of dismembering plants mentioned in sections 7.2.5 and 7.2.7 to 7.2.11.