i. With regard to Immediate-or-Cancel and Fill-or-Kill orders, Field 12 (Validity period date and time) should be left blank for Immediate-or-Cancel orders and Fill-or-Kill orders (please see Field 10 - Validity period). This is because these types of orders are intended to be executed immediately upon entry into the order book (either in full, in the case of Fill-or-Kill orders or to the maximum quantity possible, in the case of Immediate-or-Cancel orders).
ii. With regard to the "Other" category, the reference to the date and time stamps for ‘other’ types of validity periods means any other type of validity period which is not specifically listed in Field 10 (Validity period). In that case, Field 10 should be populated with a unique four letter code which represents that specific type of validity period and Field 12 should be populated.