References to PROCEDURE DIVISION names
PROCEDURE DIVISION names that are explicitly referenced in a program must be unique within a section.
A section-name is the highest and only qualifier available for a paragraph-name and must be unique if referenced. (Section-names are described under Procedures.)
If explicitly referenced, a paragraph-name must not be duplicated within a section. When a paragraph-name is qualified by a section-name, the word SECTION must not appear. A paragraph-name need not be qualified when referred to within the section in which it appears. A paragraph-name or section-name that appears in a program cannot be referenced from any other program.