+Article 2 1.

Article 2 1.

NACE Rev. 2 shall include:

(a) 

a first level consisting of headings identified by an alphabetical code (sections);

(b) 

a second level consisting of headings identified by a two-digit numerical code (divisions);

(c) 

a third level consisting of headings identified by a three-digit numerical code (groups); and

(d) 

a fourth level consisting of headings identified by a four-digit numerical code (classes).

1. Overview

,

1.1 References

1.2 Identified Requirements

1.3 Related Standards

2. Identified Requirements

Requirements

3. Related Standards

Standards