Hard lay lines
Hard lay lines mean lines that are at least as stiff as 5/16 inch (0.8 cm) diameter line composed of polyester wrapped around a blend of polypropylene and polyethylene and 42 visible twists of strands per foot of line.
Source
50 CFR § 229.2
Scoping language
In addition to the definitions contained in the Act and 216.3 of this chapter, and unless otherwise defined in this chapter, the terms in this chapter have the following meaning: