johnwmaher
The info on the site re infants is not specific enough. You may have to call in.
As to your other question:
From Flight Rewards Terms and Conditions
CHANGING/CANCELLING CLASSICFLIGHT AND MARKET FARE FLIGHT REWARDS RESERVATIONS
37. Changes to unused flight rewards (i.e. flight date(s), flight time(s), class of service, routing and/or itinerary) may be made up to a minimum of two hours prior to departure. A fee of C$90.00 plus taxes per ticket. This fee is non-refundable.
38. Changes to the flight reward itinerary (e.g. region, destination, class of service, flight date, flight time, seasonality, advance purchase or minimum/maximum stay) may result in additional mileage being required from the original flight reward. Additional miles are collected at the time of change.
https://www4.aeroplan.com/terms_and_...tion=rewardair