Division headers

A division header is a combination of words, followed by a separator period to indicate the beginning of a division.

See the following division headers:

IDENTIFICATION DIVISION.
ENVIRONMENT DIVISION.
DATA DIVISION.
PROCEDURE DIVISION.

A division header (except when a USING phrase is specified with a PROCEDURE DIVISION header) must be immediately followed by a separator period. Except for the USING phrase, no text can appear on the same line.