storage_parameter

storage_parameter 
      ::= 
      ( ( "pctfree" n ) 
      | ( "pctused" n ) 
      | ( "initrans" n ) 
      | ( "maxtrans" n ) 
      | ( "storage" "(" storage_spec { storage_spec } ")" ) ) 

This rule is called by

alter_snapshot_log
alter_snapshot
alter_table_spec
create_snapshot_log
create_snapshot
create_table