The POTA park requires a specific coordinate for access, which is only used when applying for the physical park number. It is not provided every time an activity takes place. Additionally, POTA activities do not require mandatory use of special communication phrases.That means you can use CQ POTA BXXXX, or CP BXXXX.If you are willing or if the other party asks, you can inform them of the current park entity number (i.e., CN-xxxx) that this station is located in.