What is a special provision concerning the veto of appropriation bills?

The correct choice highlights a unique aspect of how appropriation bills can be treated when it comes to vetoes in the legislative process. In many states, including Wyoming, the governor has the authority to exercise a line-item veto on appropriation bills. This means that rather than rejecting an entire bill, the governor can selectively veto specific items or appropriations within that bill. This provision allows for more precise fiscal control, enabling the governor to eliminate certain funding allocations without discarding the entire budget.

Such a provision is significant because it provides a tool for the executive branch to manage the budget more effectively by targeting specific appropriations that may be deemed unnecessary or excessive. This selective veto power reflects a balance of authority between the legislative and executive branches, allowing for negotiation and adjustment of funding priorities while ensuring that crucial components of the budget can still be enacted.

In contrast, if the other choices were correct, it would imply a more rigid approach to vetoing where either every part of the bill would have to be rejected or where vetoes could not occur at all, which would limit the governor's ability to act selectively on budgetary matters.