Here are the rules from an E fare EWR-SHV, truncated to show the pertinent section:
Fare Rules Export from Wandering Aramean Travel Tools
Code:
Fare details for EA7NN
INSTANT PURCHASE
PENALTIES
FARE RULE CANCELLATIONS TICKET IS NON-REFUNDABLE. NOTE - TEXT BELOW NOT
VALIDATED FOR AUTOPRICING. IF ANY PART OF THE TICKET IS UNUSED IT HAS NO
VALUE AFTER TICKETED DEPARTURE DATE. CHANGES CHARGE USD 150.00 FOR REISSUE.
NOTE - TEXT BELOW NOT VALIDATED FOR AUTOPRICING. ITINERARIES MAY BE REBOOKED
UP TO ONE YEAR FROM ORIGINAL TICKET ISSUE DATE PROVIDED THE PASSENGER CANCELS
THE TICKETED FLIGHT RESERVATION PRIOR TO TICKETED DEPARTURE TIME. IF THE
TICKETED FLIGHT RESERVATION IS NOT CANCELLED PRIOR TO TICKETED DEPARTURE
TIME REBOOKING IS NOT PERMITTED AND THE TICKET HAS NO VALUE. ----------
SECTION 1 - WHOLLY UNUSED TICKETS - BEFORE DEPARTURE OF THE OUTBOUND IN
THE EVENT OF CHANGES TO TICKETED FLIGHTS BEFORE DEPARTURE OF JOURNEY AND
WITHIN TKT VALIDITY CHARGE USD 150.00 OR HIGHEST FEE OF ANY CHANGED FARE
COMPONENT WITHIN JOURNEY. A. REPRICE USING FARES IN EFFECT WHEN TKT WAS
ISSUED PROVIDED ALL OF THE FOLLOWING CONDITIONS ARE MET - 1. NO CHANGE
TO 1ST FLIGHT COUPON / FARE BREAKS 2. SAME FARE ON 1ST FARE COMPONENT IS
USED 3. CO FARES ARE USED 4. PRIVATE FARE TARIFFS ARE INCLUDED 5. ALL RULE
AND BOOKING CODE PROVISIONS ARE MET 6. VALIDATE ADVANCE RES REQUIREMENTS
WHEN BOOKING DATE KNOWN 7. ADV RES IS MEASURED FROM ORIGINAL TKT DATE TO
DEPARTURE OF JOURNEY WHEN CHANGE RESULTS IN LOWER FARE REFUND RESIDUAL
VIA VOUCHER AND COLLECT PENALTY ENDORSEMENT BOX- HIGHER NON-REF AMOUNT.
OR - B. REPRICE USING CURRENT FARES PROVIDED ALL OF THE FOLLOWING CONDITIONS
ARE MET - 1. CO FARES ARE USED 2. PRIVATE TARIFFS ARE INCLUDED 3. VALIDATE
ADVANCE RES REQUIREMENTS WHEN BOOKING DATE KNOWN 4. ADV RES IS MEASURED
FROM REISSUE DATE TO DEPARTURE OF JOURNEY WHEN CHANGE RESULTS IN LOWER
FARE REFUND RESIDUAL VIA VOUCHER AND COLLECT PENALTY ENDORSEMENT BOX- HIGHER
NON-REF AMOUNT. OR - C. REPRICE USING CURRENT FARES - ONLY BOOKING CODE
CHANGES PERMITTED PROVIDED ALL OF THE PROVIDED ALL OF THE FOLLOWING CONDITIONS
ARE MET - 1. NO CHANGE IN FARE BREAKS 2. CO FARES ARE USED 3. PRIVATE TARIFFS
ARE INCLUDED 4. VALIDATE ADVANCE RESERVATIONS REQUIREMENTS WHEN BOOKING
DATE KNOWN 5. ADV RES IS MEASURED FROM REISSUE DATE TO DEPARTURE OF THE
JOURNEY WHEN CHANGE RESULTS IN LOWER FARE REFUND RESIDUAL VIA VOUCHER AND
COLLECT PENALTY ENDORSEMENT BOX- HIGHER NON-REF AMOUNT. OR - SUBSECTION
1A. - WHOLLY UNUSED TICKETS - BEFORE DEPARTURE OF THE OUTBOUND IN CASES
OF DEATH BEFORE DEPARTURE OF JOURNEY AND WITHIN TKT VALIDITY IN THE CASE
OF DEATH OF PASSENGER OR FAMILY MEMBER - NO CHARGE OR HIGHEST FEE OF ANY
CHANGED FARE COMPONENT WITHIN JOURNEY AND A. REPRICE USING FARES IN EFFECT
WHEN TKT WAS ISSUED PROVIDED ALL OF THE FOLLOWING PROVIDED ALL OF THE FOLLOWING
CONDITIONS ARE MET - 1. NO CHANGE TO FARE BREAKS 2. SAME FARE ON 1ST FARE
COMPONENT IS USED 3. CO FARES ARE USED 4. PRIVATE FARE TARIFFS ARE INCLUDED
5. ALL RULE AND BOOKING CODE PROVISIONS ARE MET 6. VALIDATE ADVANCE RES
REQUIREMENTS WHEN BOOKING DATE KNOWN 7. ADV RES IS MEASURED FROM ORIGINAL
TKT DATE TO DEPARTURE OF JOURNEY OR - B. REPRICE USING CURRENT FARES PROVIDED
ALL OF THE FOLLOWING CONDITIONS ARE MET- 1. CO FARES ARE USED 2. PRIVATE
TARIFFS ARE INCLUDED 3. VALIDATE ADVANCE RES REQUIREMENTS WHEN BOOKING
DATE KNOWN 4. ADV RES IS MEASURED FROM THE REISSUE DATE TO DEPARTURE OF
JOURNEY OR - C. REPRICE USING CURRENT FARES - ONLY BOOKING CODE CHANGES
PERMITTED PROVIDED ALL OF THE FOLLOWING CONDITIONS ARE MET - 1. NO CHANGE
IN FARE BREAKS 2. CO FARES ARE USED 3. PRIVATE TARIFFS ARE INCLUDED 4.
VALIDATE ADVANCE RES REQUIREMENTS WHEN BOOKING DATE IS KNOWN 5. ADV RES
IS MEASURED FROM REISSUE DATE TO DEPARTURE OF JOURNEY OR - D. CHANGES NOT
PERMITTED/REFUND TKT-ANY REMAINING AMOUNT WILL APPLY TO THE NEW TKT WHEN
CHANGE RESULTS IN LOWER FARE REFUND RESIDUAL VIA VOUCHER. ENDORSEMENT BOX
- HIGHER NON-REF AMT OR - SUBSECTION 1B. - WHOLLY UNUSED TICKETS - BEFORE
DEPARTURE OF THE OUTBOUND IN CASES OF ILLNESS BEFORE DEPARTURE OF JOURNEY
AND WITHIN TKT VALIDITY IN THE CASE OF ILLNESS OF PASSENGER OR FAMILY MEMBER
- CHARGE USD 150.00 OR HIGHEST FEE OF ANY CHANGE FARE COMPONENT WITHIN
JOURNEY AND A. REPRICE USING FARES IN EFFECT WHEN TKT WAS ISSUED PROVIDED
ALL OF THE FOLLOWING CONDITIONS ARE MET - 1. NO CHANGE TO FARE BREAKS 2.
SAME FARE ON 1ST FARE COMPONENT IS USED 3. CO FARES ARE USED 4. PRIVATE
FARE TARIFFS ARE INCLUDED 5. ALL RULE AND BOOKING CODE PROVISIONS ARE MET
6. VALIDATE ADVANCE RES REQUIREMENTS WHEN BOOKING DATE KNOWN 7. ADV RES
IS MEASURED FROM ORIGINAL TKT DATE TO DEPARTURE OF JOURNEY OR - B. REPRICE
USING CURRENT FARES PROVIDED ALL OF THE FOLLOWING CONDITIONS ARE MET- 1.
CO FARES ARE USED 2. PRIVATE TARIFFS ARE INCLUDED 3. VALIDATE ADVANCE RES
REQUIREMENTS WHEN BOOKING DATE KNOWN 4. ADV RES IS MEASURED FROM THE REISSU
DATE TO DEPARTURE OF JOURNEY OR - C. REPRICE USING CURRENT FARES - ONLY
BOOKING CODE CHANGES PERMITTED PROVIDED ALL OF THE FOLLOWING CONDITION
ARE MET - 1. NO CHANGE IN FARE BREAKS 2. CO FARES ARE USED 3. PRIVATE TARIFFS
ARE INCLUDED 4. VALIDATE ADVANCE RES REQUIREMENTS WHEN BOOKING DATE IS
KNOWN 5. ADV RES IS MEASURED FROM REISSUE DATE TO DEPARTURE OF JOURNEY
WHEN CHANGE RESULTS IN LOWER FARE REFUND RESIDUAL VIA VOUCHER. ENDORSEMENT
BOX - HIGHER NON-REF AM OR - SECTION 2. - PARTIALLY USED TICKETS - AFTER
DEPARTURE OF JOURNEY AND WITHIN TICKET VALIDITY CHARGE USD 150.00 OR HIGHEST
FEE OF ANY CHANGED FARE COMPONENT WITHIN JOURNEY. AND REPRICE A. CHANGED
FARE COMPONENTS USE FARES IN EFFECT TODAY A1. ALL OTHERS USE CURRENTLY
TKTD FARE PROVIDED ALL OF THE FOLLOWING CONDITIONS ARE MET- 1. NO CHANGE
TO FARE BREAKS UP TO THE FIRST CHANGED FARE COMPONENT 2. FULLY FLOWN FARE
NOT REPRICED TO A FURTHER POINT 3. CO FARES ARE USED 4. PRIVATE TARIFFS
ARE INCLUDED 5. ALL RULE AND BOOKING CODE PROVISIONS ARE MET 6. VALIDATE
ADVANCE RES REQUIREMENTS WHEN BOOKING DATE KNOWN 7. ADV RES IS MEASURED
FROM REISSUE DATE TO DEPARTURE OF PRICING UNIT OR - B. CHANGED FARE COMPONENTS
USING FARES IN EFFECT WHEN THE TICKET WAS ISSUED. B1. UNCHANGED FARE COMPONENTS
USING CURRENTLY TICKETED FARES. PROVIDED ALL OF THE FOLLOWING CONDITIONS
ARE MET - 1. NO CHANGE TO FARE BREAKS 2. FULLY FLOWN FARE NOT REPRICED
TO FURTHER POINT 3. CO FARES ARE USED 4. PRIVATE TARIFFS ARE INCLUDED 5.
ALL RULE AND BOOKING CODE PROVISIONS ARE MET 6. VALIDATE ADVANCE RES REQUIREMENTS
WHEN BOOKING DATE IS KNOWN 7. ADV RES IS MEASURED FROM ORIGINAL TKT DATE
TO DEPARTURE OF THE JOURNEY WHEN CHANGE RESULTS IN LOWER FARE REFUND RESIDUAL
VIA VOUCHER AND COLLECT PENALTY ENDORSEMENT BOX- HIGHER NON-REF AMOUNT.
OR - SUBSECTION 2A. - PARTIALLY USED TICKETS - AFTER DEPARTURE OF THE OUTBOUND
IN THE CASE OF DEATH - AFTER DEPARTURE OF JOURNEY AND WITHIN TICKET VALIDITY
IN THE CASE OF DEATH OF PASSENGER OR FAMILY MEMBER NO CHARGE OR HIGHEST
FEE OF ANY CHANGED FARE COMPONENT WITHIN JOURNEY AND A. CHANGES NOT PERMITTED/REFUND
TKT-ANY REMAINING AMT WILL APPLY TO NEW TKT OR - B. CHANGED FARE COMPONENTS
USE FARES IN EFFECT TODAY B1. ALL OTHERS USE CURRENTLY TKTD FARE PROVIDED
ALL OF THE FOLLOWING CONDITIONS ARE MET- 1. NO CHANGE TO FARE BREAKS UP
TO THE FIRST CHANGED FARE COMPONENT 2. FULLY FLOWN FARE NOT REPRICED TO
A FURTHER POINT 3. CO FARES ARE USED 4. PRIVATE TARIFFS ARE INCLUDED 5.
ALL RULE AND BOOKING CODE PROVISIONS ARE MET 6. VALIDATE ADVANCE RES REQUIREMENTS
WHEN BOOKING DATE KNOWN 7. ADV RES IS MEASURED FROM REISSUE DATE TO DEPARTURE
OF PRICING UNIT OR - C. CHANGED FARE COMPONENTS USING FARES IN EFFECT WHEN
THE TKT WAS ISSUED. C1. UNCHANGED FARE COMPONENTS USING CURRENTLY TICKETED
FARES. PROVIDED ALL OF THE FOLLOWING CONDITIONS ARE MET - 1. NO CHANGE
TO FARE BREAKS 2. FULLY FLOWN FARE NOT REPRICED TO FURTHER POINT 3. CO
FARES ARE USED 4. PRIVATE TARIFFS ARE INCLUDED 5. ALL RULE AND BOOKING
CODE PROVISIONS ARE MET 6. VALIDATE ADVANCE RES REQUIREMENTS WHEN BOOKING
DATE IS KNOWN 7. ADV RES IS MEASURED FROM ORIGINAL TKT DATE TO DEPARTURE
OF THE JOURNEY WHEN CHANGE RESULTS IN A LOWER FARE REFUND RESIDUAL VIA
VOUCHER. ENDORSEMENT BOX - HIGHER NON-REF AMT. OR - SUBSECTION 2B. - PARTIALLY
USED TICKETS - AFTER DEPARTURE OF THE OUTBOUND IN THE CASE OF ILLNESS -
AFTER DEPARTURE OF JOURNEY AND WITHIN TICKET VALIDITY IN THE CASE OF ILLNESS
OF PASSENGER OR FAMILY MEMBER CHARGE USD 150.00 OR HIGHEST FEE OF ANY CHANGED
FARE COMPONENT WITHIN JOURNEY AND REPRICE A. CHANGED FARE COMPONENTS USE
FARES IN EFFECT TODAY A1. ALL OTHERS USE CURRENTLY TKTD FARE PROVIDED ALL
OF THE FOLLOWING CONDITIONS ARE MET- 1. NO CHANGE TO FARE BREAKS UP TO
THE FIRST CHANGED FARE COMPONENT 2. FULLY FLOWN FARE NOT REPRICED TO A
FURTHER POINT 3. CO FARES ARE USED 4. PRIVATE TARIFFS ARE INCLUDED 5. ALL
RULE AND BOOKING CODE PROVISIONS ARE MET 6. VALIDATE ADVANCE RES REQUIREMENTS
WHEN BOOKING DATE KNOWN 7. ADV RES IS MEASURED FROM REISSUE DATE TO DEPARTURE
OF PRICING UNIT OR - REPRICE B. CHANGED FARE COMPONENTS USING FARES IN
EFFECT WHEN THE TKT WAS ISSUED. B1. UNCHANGED FARE COMPONENTS USING CURRENTLY
TICKETED FARES. PROVIDED ALL OF THE FOLLOWING CONDITIONS ARE MET - 1. NO
CHANGE TO FARE BREAKS 2. FULLY FLOWN FARE NOT REPRICED TO FURTHER POINT
3. CO FARES ARE USED 4. PRIVATE TARIFFS ARE INCLUDED 5. ALL RULE AND BOOKING
CODE PROVISIONS ARE MET 6. VALIDATE ADVANCE RES REQUIREMENTS WHEN BOOKING
DATE IS KNOWN 7. ADV RES IS MEASURED FROM ORIGINAL TKT DATE TO DEPARTURE
OF THE JOURNEY WHEN CHANGE RESULTS IN A LOWER FARE REFUND RESIDUAL VIA
VOUCHER. ENDORSEMENT BOX - HIGHER NON-REF AMT. ------ NOTE - AFTER EACH
TICKETED DEPARTURE TIME 1.NO CHANGES PERMITTED IF PASSENGER HAS NOT CANCELLED
THEIR TICKETED FLIGHT RESERVATIONS. 2.TICKET HAS NO VALUE IF PASSENGER
HAS NOT CANCELLED THEIR TICKETED FLIGHT RESERVATIONS. 3. NO STANDBY PERMITTED
IF PASSENGER HAS NOT CANCELLED THEIR TICKETED FLIGHT RESERVATIONS. GENERAL
RULE - APPLY UNLESS OTHERWISE SPECIFIED CANCELLATIONS PER TICKET CHARGE
USD 150.00 FOR LOST TICKET. NOTE - TEXT BELOW NOT VALIDATED FOR AUTOPRICING.
NO SERVICE CHARGE WILL BE IMPOSED FOR MILITARY PASSENGERS WHEN TRANSPORTATION
IS PAID WITH A U.S. GOVERNMENT TRANSPORTATION REQUEST FORM NO. 1169.
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The fare break bit might apply but I think the problem is simply that it is usually cheaper to buy a new fare rather than change based on the fees.