If any bill is not returned by the Governor within ten days after it has been presented to him, the bill becomes law in like manner as if he had signed it, unless the General Assembly, by its adjournment, prevents its return, in which case it becomes law, unless he files the same, with his objections, in the office of the Secretary of the Commonwealth, and gives notice thereof by public proclamation within 30 days after such adjournment.
101 Pa. Code § 9.124