Confirmations or comparisons shall include, in addition to an adequate description of the security (which shall include payment options on a unit investment trust series), the price at which the transaction was made and any other information deemed necessary to insure that the buyer and seller agree as to details of the transaction. Such "other information" should include, if applicable, but need not be limited to, such phrases as "ex-warrants," "ex-stock," "registered," "flat," "part-redeemed," "Canadian funds," "with proxy," etc.