What is a section and how is it identified?

A section is the broadest level of NACE, identified by one letter. The EUR-Lex summary states that NACE Rev. 2 update 1 comprises four levels, with sections identified by one letter, and it lists the 22 sections by heading. A section groups broad areas of activity, such as agriculture, manufacturing, construction, trade, or education, so that statistics can be presented as a broad overview. A section does not describe a specific activity in detail. That detail appears at division, group and class level, inside the section.

How are the 22 sections listed?

The EUR-Lex summary lists the 22 sections in order, from agriculture, forestry and fishing through to activities of extraterritorial organisations and bodies. The list is a list of headings, not a list of codes with meanings. The letter for each section is shown in the detailed structure in the Eurostat manual, where each section heading is followed by its divisions, groups and classes. The summary list and the manual structure must be read together: the summary gives the order and the headings, and the manual gives the letter, the divisions inside the section, and the explanatory note that states what the section includes and excludes.

The sections in NACE Rev. 2.1, in the order given in the EUR-Lex summary, are agriculture, forestry and fishing; mining and quarrying; manufacturing; electricity, gas, steam and air conditioning supply; water supply, sewerage, waste management and remediation activities; construction; wholesale and retail trade; transportation and storage; accommodation and food service activities; publishing, broadcasting and content production and distribution activities; telecommunication, computer programming, consulting, computing infrastructure and other information service activities; financial and insurance activities; real estate activities; professional, scientific and technical activities; administrative and support service activities; public administration and defence, and compulsory social security; education; human health and social work activities; arts, sports and recreation; other service activities; activities of households as employers and undifferentiated goods and service producing activities of households for own use; and activities of extraterritorial organisations and bodies.

Section letter in the manual structure	Heading in the EUR-Lex summary
A	Agriculture, forestry and fishing
C	Manufacturing
G	Wholesale and retail trade
J	Publishing, broadcasting and content production and distribution activities
K	Telecommunication, computer programming, consulting, computing infrastructure and other information service activities
V	Activities of extraterritorial organisations and bodies

What does a section heading include and exclude?

A section heading is defined by its explanatory note, not by the heading words alone. The manual states that the content and scope of each position is defined through detailed explanatory notes, which also highlight boundary issues by providing examples of activities that may appear similar to those belonging to the position but are classified elsewhere. The note for section A, for example, states that the section includes the exploitation of vegetal and animal natural resources, and that it excludes undifferentiated subsistence goods producing activities of households, which are classified in class 98.10. The heading agriculture, forestry and fishing therefore covers the activities stated in the note, and it does not cover every activity that uses a word from the heading.

The note for a section also sets the boundary with neighbouring sections. An activity that looks as if it belongs in one section may be stated in the note to belong in another, and the cross reference in the note gives the class where it is classified. A reader who relies on the heading words alone, without reading the note, risks placing an activity in the wrong section. The heading is a label for the group of categories inside it. The note is the definition of the group.

Why does the section letter not appear in a class code?

The section letter does not appear in the numeric code for a division, group or class. The manual states that the code for the section level is not integrated in the NACE code that identifies the division, the group and the class describing a specific activity. The example given is code 20.51, where 20 is the division, 20.5 is the group, and 20.51 is the class, while section C, to which the class belongs, does not appear in the code itself. A reader who sees only a numeric code must therefore use the structure table to find the section, by finding the division inside its section. A reader who sees a section letter beside a code, in a table or a dataset, is seeing the section added for presentation, not part of the code.

That separation matters when codes are compared across versions. After the split of the former Section J, the letters for later sections shifted by one, while many division numbers stayed the same. A division number that sat in one section in NACE Rev. 2 may sit in a differently lettered section in NACE Rev. 2.1, even though the division itself is largely unchanged. The numeric code alone does not show that shift. The structure tables for both versions, read side by side, show it.

What does a section not decide?

A section does not decide the class for an activity, and it does not decide an entry for a business. It is the broadest grouping, useful for overview tables and for the first step in narrowing a search. The explanatory note for the section, the notes for the divisions inside it, and the notes for the classes at the end of each path, together state what belongs where. The institute or register that holds the record confirms an entry. A section letter is a starting point for reading, not a conclusion about a specific activity.

Find the section heading in the EUR-Lex summary, find its divisions and its note in the manual structure, and confirm any entry with the national statistical institute or the business register that holds the record.