Assertion: cage | /r/HasAspect | total area
Facets:
Source sentences:
text: 1. laying hens must have: (a) at least 750 cm2 [120 sq in] of cage area per hen, 600 cm2 [90 sq in] of which shall be usable; the height of the cage other than that above the usable area shall be at least 20 cm [8"] at every point and no cage shall have a total area that is less than 2000 cm2 [400 sq in];