machine cavities in operation
Defined in 1 dictionary — U.S. Code
United States Code
15 U.S.C. § 8702 — for the purposes of this chapter
The term "machine cavities in operation" means those machine cavities associated with a block machine that have produced concrete masonry units within the last 6 months of the date set for determining eligibility and is fully operable and capable of producing concrete masonry units.