Polish carriers in principle adhere to the agreements at the Krakovets-Korchova checkpoint regarding the passage of seven vehicles per hour and the passage of humanitarian and military cargo. This was reported to a journalist of UNN by the newly created headquarters for assisting Ukrainian drivers in Poland.
In principle, they comply, but they check documents and compliance. This is not exactly their competence, but this is the situation. Mostly they check humanitarian aid
Addendum
Polish protesters and Ukrainian drivers have agreed to allow 7 cars per hour to pass through the Krakovets-Korchova checkpoint, with humanitarian and military cargo moving out of line. This follows a hunger strike by Ukrainian drivers.
Ukraine and Poland also agreed to unblock the Uhryniv-Dolhobyczów checkpoint for empty trucks and to create separate passes for empty vehicles at the Yahodyn-Dorogusk and Krakivets-Korchova checkpoints in the eChechora system.