Items of uniform dress are listed in 933.1 through 933.6 . These lists include all items to which allowances are applicable, that employees in these categories may be required to wear under various circumstances (see 936.14 ). The lists do not mean that every employee is required to acquire and wear every one of the items at some time during service in the category. On the contrary, the list for each of several categories contains a number of items that some employees in a particular category may never need to wear. It is the intent of these regulations that appropriate items for wear in matters of this kind be determined at the installations, in accordance with collective bargaining agreements and Postal Service policy.