A guest booked a ticket prior to the launch date although flying after Fare Choices is introduced. Which rules apply?

A guest booked a ticket prior to the launch date although flying after Fare Choices is introduced. Which rules apply?

If a ticket was issued prior to the launch date, the old rules apply. If tickets are issued on or after the launch date, the Fare Choices’ rules will apply. The travel date does not matter. If the ticket is changed and reissued on or after launch date, the new rules will apply. 
Please note, JetPrivilege entitlements will be revised effective travel on or after Aug 17, 2016 irrespective of the booking date. Complete details can be viewed here.