UNDER syntax

Do people interpret this syntax to mean that you can only have an UNDER
clause when using the OF <user-defined type> clause as well?

<table definition> ::=
CREATE [ <table scope> ] TABLE <table name>
<table contents source>
[ ON COMMIT <table commit action> ROWS ]

<table contents source> ::=
<table element list>
| OF <user-defined type>
[ <subtable clause> ]
[ <table element list> ]
<subtable clause> ::=
UNDER <supertable clause>