Attempting to convert this aa.com text into something that resembles a properly constructed English sentence:

"IN THE EVENT OF CHANGES TO TICKETED FLIGHTS BEFORE DEPARTURE OF JOURNEY AND WITHIN TKT VALIDITY CERTAIN DOMESTIC REISSUE PROVISIONS MAY BE OVERRIDDEN BY THOSE OF AA INTERNATIONAL FARES APPLY CARRIER COMPENSATION FEE OF USD 150.00/CAD 150.00 FOR REISSUE OR HIGHEST FEE OF ANY CHANGED FARE COMPONENT WITHIN JOURNEY"

Does this mean I will be charged $150 only if I change the flight after departure, or $150 for any change? If the former, does that mean there is no change fee if I change prior to departure?

Or does this mean something else entirely and I am looking in the wrong place?