Number	Description
01	Contracts come due on the third Friday of the expiration month.
02	Contracts come due two business days before the third Friday of the expiration month.
03	Contracts come due on the Friday preceding the third Wednesday of the expiration month.
04	Contracts come due on the eighth calendar day of the month preceding the expiration month or next succeeding Exchange business day if the eighth day is not an Exchange business day.
05	Contracts come due two Fridays before the third Wednesday of the expiration month.
06	Contracts come due on the last Thursday of the expiration month except November. In November, the contract expires on the Thursday before Thanksgiving Day.
07	Contract expires on the last Friday that is more than 3 business days before the first business day of the expiration month.
08	Contract expires on the Thursday before the third Friday of the month for the months of March, June, September, and December. In all other months, contracts expire on the third Friday of the month.
09	Contract expires on the second to last Friday of the month that precedes the expiration month.
10	Contract expires on the first Friday of the month preceding the expiration month.
11	Contract expires on the second Friday of the month preceding expiration, except for December. In December, the contract expires on the second Friday of December.
12	Contract expires on the second Friday of the month preceding expiration.
13	Contract expires on the first business day preceding the second Friday of the expiration month for March, June, September, and December. Otherwise, the contract expires on the Friday that precedes the third Saturday of the month.
14	Contract expires on the first Friday of the expiration month except November. In November, the contract expires on the third Friday in November.
15	Contract expires on the sixth to last business day of the month preceding expiration.
16	Contract expires on the third business day of the expiration month.
17	Contract expires on the Friday preceding by at least five business days the last business day of the expiration month.
18	For March, June, September, and December, the contract expires on the seventh business day preceding the last business day of the expiration month. For all other months, the contract expires contract expires on the Friday that precedes by at least five business days the last business day of the expiration month.
19	Contract expires on the Friday that is at least 10 business days before the end of the month that precedes the expiration month.
20	Contract expires four business days before the first day of the expiration month.
21	Contract expires on the Friday that immediately precedes the third business day before the 25th of the month preceding expiration.
22	Contract expires on the Friday preceding the last business day of the month preceding the expiration month.
23	Contract expires on the second business day before the last calendar day of the expiration month.
24	Contract expires seven business days before the last business day of the expiration month.
25	Contract expires on the last Friday that preceded by at least five business days the last business day of the month before the expiration month.
26	Contract expires on the Friday that is at least five business days before the last business day of the month before the expiration month.
27	Contract expires on the last business day of the month before the expiration month.
28	Contract expires on the second business day before the third Wednesday of the expiration month.
29	Contract expires on the tenth business day of the expiration month.
30	Contract expires on the last business day of the week that is at least six business days before the first business day of the expiration month.
31	For March, June, September, and December, contract expires on the business day that is before the second Friday of the expiration month. On all other months, the contract expires on the third Friday of the expiration month.
32	Contract expires on the last Friday of the month before expiration.
33	Contract expires on the last business day of the month.
34	Contract expires on the first business day immediately preceding the third Wednesday of the expiration month.
35	Contract expires on the eleventh business day of the month
36	Contract expires fourteen business days before the last business day of the month.
37	Contract expires on the third business day before the 25th of the month before the delivery month.
38	Contract expires eight business days before the last business day of the expiration month.
39	Contract expires on the business day before the third Friday of the expiration month.
40	Contract expires on the 12th business day of the month.
41	Contract expires on the third to the last business day of the delivery month.
42	Contract expires on the fourth to the last business day of the delivery month.
43	Contract expires on the eighth to the last business day of the delivery month.
44	Contract expires on the 15th calendar day of the month preceding the delivery month or the next succeeding Exchange business day if the 15th calendar day is not an Exchange business day.
45	Contract expires on the second business day before the first day of the delivery month.
46	Contract expires on the third business day before the first calendar day of the delivery month.
47	Contract expires on the 17th day from the end of the delivery month. 
48	Contract expires on the third Wednesday of the expiring contract month.
49	Contract expires on the second Friday of the expiration month.
50	Contract expires on the third Wednesday of the month preceding the expiration month.
51	Contract expires on the second Thursday of the month preceding the expiration month.
52	Contract expires on the first business day of the month preceding the expiration month.
53	Contract expires on the fourth calendar day of the delivery month. If this is not a business day, then the contract expires on the next business day following.
54	Contract expires three business days before the 10th calendar day of the delivery month.
55	Contract expires four business days before the 10th calendar day of the delivery month. 
56	Contract expires six business days before the 25th of the month before the delivery month.
57	Contract expires three business days before the third Wednesday of the expiration month.
58	Contract expires on the business day immediately before the 16th calendar day of the contract month.
59	Contract expires on the 15th calendar day of the contract month.
60	Contract expires on the 10th to the last business day of the contract month
61	Contract expires on the 13th to the last business day of the delivery month.
62	Contract expires on the first business day preceding the second Friday of the contract month for March, June, September, and December. For all other months, contract expires on the third Friday of the contract month.
63	Contract expires on the business day immediately preceding the last business day of the contract month, except that trading in the December contract will expire on the 10th business day of that month.
64	Contract expires on the second to the last Friday of the contract month.
65	Contract expires on the 23rd day of the delivery month, except in July in which the contract expires on the 14th day of the delivery month.
66	Contract expires on the last business day of the contract month except in December, when it is December 20th or the business day immediately preceding December 20th.
67	Contract expires 16 days before the first day of the delivery month.
68	Contract expires six business days before the last business day of the delivery month.
69	In March, June, September, and December, the contract expires on the second business day before the third Wednesday of the expiration month. In all other months, the contract expires on the Friday before the third Wednesday of the contract month.
70	Contract expires two business days before the 14th calendar day of the delivery month.
71	Contract expires 7 business days before the rule in Pattern #70.
72	Contract expires 10 business days before the 20th calendar day of the delivery month.
73	Contract expires on the last Thursday of the month preceding the expiration month.
74	Contract expires on the fifth to the last business day of the month preceding the expiration month.
75	Contract expires on the third Friday of the month preceding the delivery month.
76	Contract expires on the last Friday of the expiration month.
77	Contract expires on the last business day of the month preceding the expiration month. (2) FirstNoticeDate is the second business day of the delivery month.
78	Contract expires on the 3rd Friday of the expiration month. (2) The expiration date is the day following the last trading day.
79	Contract expires 1 business day prior to the 15th calendar day.
80	Contract expires 3 business days prior to the 15th calendar day.
81	Contract never expires. 

{** ¸ 1987 - 1999 Omega Research, Inc. **}