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
<supertableclause>