You should activate and use your new chip/tap card immediately. However, you can use your old card until you activate your new card. Your old card will expire within 60 days of your new card being issued. You cannot use both cards at the same time.
Your benefit balance will be carried over to your new card. When your new card is activated, your current card will be deactivated and cannot be used.
If you do not activate your chip card within 90 days of it being issued, it will deactivate and you will need to get a replacement.
NOTE: If you are receiving a replacement card, you will need to choose a new PIN. Your current PIN will not carry over to this replacement card.