Code of Federal Regulations (alpha)

CFR /  Title 7  /  Part 29  /  Sec. 29.1010 Crude.

A subdegree of maturity. Crude leaves are usually hard and slick as a result of extreme immaturity. A similar condition may result from fire-kill, sunburn, or sunscald. Any leaf which is crude to the extent of 20 percent or more of its surface may be described as crude. (See Rule 20.)