For example, the word STATIC cannot be used at the 01 level of a record in the file section, but it can be used on the FD:
class-id a.
file-control.
select f1 assign "MyFile1".
select f2 assign "MyFile2".
file section.
fd f1.
01 r1 pic x static. *> This is NOT allowed
fd f2 static. *> This is OK
01 r1 pic x.
end class.