Hope this is the correct place to post this question; I searched FT and couldn't find another suitable forum to lodge this question.

I have a non Centurion/Plat Amex card. If I purchase a day pass at LGA, and use it at the LGA lounge, can I also use it later (same day) at DFW when I connect to an onward flight?

Or do I have to purchase another new day pass?

If I have a long same day layover at DFW, can the day pass be used to enter the lounge in the AM and again in the PM?

Thanks in advance.