The governor may (since 1875) veto any item in any appropriation bill, but any bill (or item) may be passed over his veto by bare majorities (of all members elected) in both houses.
His veto may be over-ridden by a two-thirds vote in each chamber, and permitting ten days to pass without signing an act is considered as acquiescence and it is promulgated by congress.
The liberum veto was based on the assumption of the absolute political equality of every Polish gentleman, with the inevitable corollary that every measure introduced into the Polish diet must be adopted unanimously.
He may veto any bill passed by the assembly, or in the case of a bill making appropriations of money he may veto any item of it, and no bill or item of an appropriation bill which he vetoes within five days (Sunday excepted) after it has been presented to him, can become a law or part of a law unless passed over his veto in each house by a two-thirds vote of the members present.
When the Long Parliament met, Williams was made chairman of a committee of inquiry into innovations in the church; and he was one of the bishops consulted by Charles as to whether he should veto the bill for the attainder of Strafford.
He may veto appropriation bills by items, but any of his vetoes may be overruled by a two-thirds vote of each house.
In the municipality the alcalde (mayor) was appointed by the governor-general, and the ayuntamiento (council) was controlled by the veto of the provincial governor and by the assembly of the province.
He may veto a bill, or in case of an appropriation bill, the separate items, but this veto may be overridden by a simple majority of the total membership of each house.
The liberum veto seems to have been originally devised to cut short interminable debates in times of acute crisis, but it was generally used either by highly placed criminals, anxious to avoid an inquiry into their misdeeds,' or by malcontents, desirous of embarrassing the executive.
Cynical manipulation by the US of its power of veto in the UN Security Council is bringing increasing international condemnation.