As the Post-Gazette reported:

The choice for thousands of union workers at Royal Dutch Shell’s petrochemical plant in Beaver County was clear Tuesday: Either stand in a giant hall waiting for President Donald Trump to speak or take the day off with no pay.

“Your attendance is not mandatory,” said the rules that one contractor relayed to employees, summarizing points from a memo that Shell sent to union leaders a day ahead of the visit to the $6 billion construction site. But only those who showed up at 7 am, scanned their ID cards, and prepared to stand for hours—through lunch but without lunch—would be paid.

“NO SCAN, NO PAY,” a supervisor for that contractor wrote.

via Workers Were Reportedly Ordered Not to Protest or Show Any ‘Resistance’ at Trump Rally in Pennsylvania | Common Dreams News