And here are the (fairly common, but clear as mud) restrictions on making changes from this fare:

- CANCELLATIONS TICKET IS NON-REFUNDABLE. NOTE
- TICKET HAS NO VALUE UNLESS PASSENGER CANCELS
TICKETED FLIGHT RESERVATIONS ON/BEFORE THE ORIGINAL
TICKETED DEPARTURE DATE. CHANGES CHARGE USD 100.00
FOR REISSUE/UNTICKETED PTA. NOTE - ITINERARIES MAY BE
REBOOKED UP TO ONE YEAR FROM ORIGINAL TICKET ISSUE
DATE PROVIDED THE PASSENGER CANCELS THE TICKETED
FLIGHT RESERVATION ON/BEFORE TICKETED DAY OF
DEPARTURE. IF NOT THEN REBOOKING IS NOT PERMITTED AND
TICKET HAS NO VALUE. --- CHANGES ARE PERMITTED FOR
100.00 USD SERVICE CHARGE. PASSENGERS TRAVELLING ON
COMPANION FARES MUST PRESENT ALL TICKETS AT THE SAME
TIME FOR ANY CHANGES. EXCEPTION- FARES COMBINED
END-ON-END ON THE TICKET// IE FARES THAT COULD STAND
ALONE IF ISSUED ON A SEPARATE TICKET // MAY BE
CHANGED SEPARATELY AND WILL RETAIN VALUE. FARE
DIFFERENCE AND SERVICE CHARGE MUST BE PAID AND
TICKETS MUST BE REISSUED AT THE SAME TIME A VOLUNTARY
CHANGE IS MADE. --- IF MULTIPLE CHANGES ARE MADE AT
THE SAME TIME ONLY ONE SERVICE CHARGE WILL APPLY PER
TICKET. IF FARES WITH DIFFERENT SERVICE CHARGES ARE
COMBINED ON THE SAME TICKET THE HIGHEST FEE OF ALL
THE CHANGED FARE COMPONENTS WILL APPLY. 1. WHOLLY
UNUSED TICKETS- CHANGES TO ORIGINATING FLIGHT OR
CHANGES TO ORIGIN/DESTINATION/STOPOVER POINT- CHANGES
MUST BE MADE ON/BEFORE ORIGINAL TICKETED DEPARTURE
DATE. REPRICE THE ENTIRE TICKET USING CURRENT FARES
APPLICABLE TO THE CHANGED ITINERARY. IF REPRICING
RESULTS IN OTHER THAN A NON REFUNDABLE FARE THE VALUE
OF UNUSED TICKET MUST BE SHOWN IN THE ENDORSEMENT BOX
OF THE NEW TICKET AS A NON REFUNDABLE AMOUNT AND WILL
REMAIN NON REFUNDABLE FOR ANY SUBSEQUENT REISSUES.
A. IF THE NEW FARE IS EQUAL TO OR HIGHER IN VALUE -
COLLECT THE FARE DIFFERENCE AND THE USD 100.00
SERVICE CHARGE. B. IF THE NEW FARE IS LOWER IN VALUE
- THE RESIDUAL AMOUNT LESS THE USD 100.00 SERVICE
CHARGE WILL BE GIVEN TO THE PASSENGER IN THE FORM OF
A NON REFUNDABLE UA TRAVEL CERTIFICATE OR MCO VALID
ONLY ON UA FLIGHTS. 2. WHOLLY UNUSED TICKETS- CHANGES
TO OTHER THAN THE ORIGINATING FLIGHT WITH NO CHANGE
TO ORIGIN/DESTINATION/STOPOVER POINTS- CHANGES TO
OTHER THAN THE ORIGINATING FLIGHT MUST BE MADE
ON/BEFORE THE DEPART- URE DATE OF THE ORIGINAL
TICKETED FARE COMPONENT WITHOUT REGARD TO ADVANCE
PUR- CHASE REQUIREMENT PROVIDED CHANGE MEETS ALL
OTHER RULES OF THE TICKETED FARE. EXCEPTION- A. IF
ORIGINAL CONTINUING/RETURN FARE COMPONENT WAS FOR
PEAK DAY TRAVEL CONTINUING/RETURN MAY BE CHANGED TO
TRAVEL ANY DAY FOR USD 100.00 SERVICE CHARGE. NO
REFUND OR TRAVEL CERTIFICATE IF NEW FARE IS LOWER. B.
IF ORIGINAL CONTINUING/RETURN WAS FOR OFF-PEAK DAY
AND CHANGE RESULTS IN TRAVEL ON OTHER THAN OFF-PEAK
DAY COLLECT DIFFERENCE IN FARE PLUS USD 100.00
SERVICE CHARGE. --- ANY COMBINABLE BOOKING CODE MAY
BE USED FOR THE NEW QUALIFIYING CONTINUING/RETURN
FARE USED FOR THE RECALCULATION. --- IF CHANGE
VIOLATES PROVISIONS OF THE
ORIGINALLY TICKETED FARE - REPRICE ENTIRE TICKET
USING CURRENT FARES APPLICABLE TO THE CHANGED
ITINERARY. COLLECT FARE DIFFERENCE PLUS USD 100.00
SERVICE CHARGE. IF REPRICING RESULTS IN OTHER THAN A
NON REFUNDABLE FARE THE VALUE OF THE ORIGINAL TICKET
MUST BE SHOWN AS A NON REFUNDABLE AMOUNT IN THE
ENDORSEMENT BOX OF THE NEW TICKET AND WILL REMAIN NON
REFUNDABLE FOR ANY SUBSEQUENT REISSUES. A. IF THE NEW
FARE IS EQUAL TO OR HIGHER IN VALUE- COLLECT THE FARE
DIFFERENCE AND THE USD 100.00 SERVICE CHARGE. B. IF
THE NEW FARE IS LOWER IN VALUE- THE RESIDUAL AMOUNT
LESS THE USD 100.00 SERVICE CHARGE WILL BE GIVEN TO
THE PASSENGER IN THE FORM OF A NON REFUNDABLE UA
TRAVEL CERTIFICATE OR MCO VALID ONLY ON UA FLIGHTS.
--- 3. PARTIALLY USED TICKETS- NO CHANGE TO ORIGIN/
DESTINATION/STOPOVER POINTS- CHANGES MAY BE MADE
ANYTIME ON/BEFORE THE DEPARTURE DATE OF THE ORIGINAL
TICKETED FARE COMPONENT WITHOUT REGARD TO ADVANCE
PURCHASE REQUIREMENT PROVIDED CHANGE MEETS ALL OTHER
RULES OF THE TICKETED FARE. EXCEPTION- A. IF ORIGINAL
CONTINUING/RETURN FARE COMPONENT WAS FOR PEAK DAY
TRAVEL CONTINUING/RETURN MAY BE CHANGED TO TRAVEL ANY
DAY FOR USD 100.00 SERVICE CHARGE. NO REFUND OR
TRAVEL CERTIFICATE IF NEW FARE IS LOWER. B. IF
ORIGINAL CONTINUING/RETURN WAS FOR OFF-PEAK DAY AND
CHANGE RESULTS IN TRAVEL ON OTHER THAN OFF-PEAK DAY
COLLECT DIFFERENCE IN FARE PLUS USD 100.00 SERVICE
CHARGE. --- ANY COMBINABLE BOOKING CODE MAY BE USED
FOR THE NEW QUALIFYING CONTINUING/RETURN FARE USED
FOR THE RECALCULATION. --- IF CHANGE VIOLATES
PROVISIONS OF THE ORIGINALLY TICKETED FARE - REPRICE
ENTIRE TICKET INCLUDING PREVIOUSLY FLOWN SEGMENTS
USING CURRENT FARES APPLICABLE TO THE CHANGED
ITINERARY. COLLECT FARE DIFFERENCE PLUS USD 100.00
SERVICE CHARGE. IF REPRICING RESULTS IN OTHER THAN A
NON REFUNDABLE FARE THE VALUE OF THE ORIGINAL TICKET
MUST BE SHOWN AS A NON REFUNDABLE AMOUNT IN THE
ENDORSEMENT BOX OF THE NEW TICKET AND WILL REMAIN
NON REFUNDABLE FOR ANY SUBSEQUENT REISSUES. --- WHEN
REPLACING FARES FOR FLOWN SEGMENTS THE BOOKING CODE
OF THE REPLACEMENT FARE MUST BE EQUAL TO OR HIGHER
THAN THE BOOKING CODE OF THE ORIGINALLY FLOWN FARE
BEING REPLACED BASED ON THE FOLLOWING HIERARCHY-
P/F/C/D/Y/A/B/M/H/Q/V/W/S/T NO REFUND OR TRAVEL
CERTIFICATE IF NEW FARE IS LOWER. 4. PARTIALLY USED
TICKETS- CHANGES TO CONTINUING/RETURN FLIGHTS WHEN
THERE IS A CHANGE TO ORIGIN/DESTINATION/ STOPOVER
POINTS- AFTER DEPARTURE REROUTING NOT PERMITTED. NEW
TICKET MUST BE PURCHASED. EXCEPTION- FARES COMBINED
END-ON-END ON THE TICKET// IE FARES THAT COULD STAND
ALONE IF ISSUED ON A SEPARATE TICKET // ARE STILL
VALID. C. SAME DAY STANDBY- UA PASSENGERS HOLDING
CONFIRMED RESERVATIONS AND TICKETS MAY STANDBY FOR
EARLIER/LATER SAME DAY FLIGHTS BETWEEN TICKETED CITY
PAIRS AT NO ADDITIONAL COST. IN ADDITION TO THE
ORIGINAL AIRPORT OF DEPARTURE/ARRIVAL PASSENGERS MAY
CHECK IN AND STANDBY TO/FROM AIRPORTS LISTED BELOW
UNLESS RESTRICTED BY THE AIRPORT PROVISIONS OF THE
FARE CITY AIRPORT CHI CGX/ORD/MDW NYC JFK/LGA WAS
DCA/IAD