50 CFR 520.3 - Definitions.
As used in these regulations:
(c) The term exempt materials means those materials described in § 520.2(b);
(d) The term non-exempt materials refers to all materials described in § 520.2(a), but not included in § 520.2(b); and
Title 50 published on 2014-10-01.
No entries appear in the Federal Register after this date, for 50 CFR Part 520.