By the "Golden Act" of 1592, which established Presbyterianism as the only legal form of Church government in Scotland, Presbyteries were "bound and astricted to receive and admit whatsoever qualified minister is presented be (sic) his Majesty or laic patron".
If a congregation refused to accept a suitable nominee, the Patron was entitled to enjoy the fruits of the original bequest - stipend, lands, house, etc.
A 1690 Act (again, by the Parliament of Scotland) did not abolish patronage, but vested this power instead in the heritors and elders of each parish, who could propose a candidate to the whole congregation, to be either approved or disapproved by them.
[6] Presbyteries were to pay compensation, typically a year's stipend, to the owner of the abolished patronage, who was to provide a formal, written renunciation in return.
Their case may have been strengthened by the fact that Article 20 of the Treaty of Union had preserved all heritable rights and jurisdictions of pre-Union Scotland.
Consequently, the Church Patronage (Scotland) Act 1711 was passed, restoring to their original owners the right to present suitably qualified candidates to Presbyteries in the event of a vacancy.
The Church of Scotland mainly acquiesced in this restoration, though it felt aggrieved and the General Assembly protested to Parliament almost every year that it was contrary to the Treaty of Union.
[9] The congregation of a Parish could only legally object to a presentee on the grounds of his suitability, so the General Assembly of the Church of Scotland laid down increasingly stringent educational, moral and practical qualifications for candidates for the ministry.
As most objections were on the acceptability of the candidate, rather than his suitability, the Assembly usually decided in favour of the Patron, particularly as he could seek civil damages in the Court of Session otherwise.
Many patrons were wary of provoking disputes, so tried to work with the heritors and elders of their parishes to present candidates who met with General Assembly criteria in terms of education, character and practical ability.
Discontented Parishioners had many options open to them at every level of Church and Civil courts to question the suitability of a candidate, on educational, moral, or practical grounds, but more normally on the firmness of his attachment to the Westminster Confession of Faith.
In addition to formal, legal opposition, many disputed appointments were occasions for popular demonstrations of discontent, sometimes linked to political demands for more democracy.
[11] An Act by the General Assembly of 1730, by which objectors to decisions of Church courts could no longer have these objections officially recorded, was regarded by Evangelicals as a move to silence their opposition to Patronage.
Each Presbytery proceeded as it saw fit, but the General Assembly of 1732 passed an Act which regulated this, by establishing the 1690 rules, granting the Patronage right to the Heritors and Elders, with procedures to be followed if a congregation objected to a candidate.
Some members, including Ebenezer Erskine wanted to see the regulations of 1649 applied, by which all heads of families in a congregation called a Minister.
The General Assembly of 1834 enacted the Veto Act, which prohibited the installation of a patron-presented minister in a congregation if the heads of a majority of member households objected to him and gave their reasons to the presbytery.
A series of civil actions in the period 1838 - 1841 in the Court of Session, and confirmed in the House of Lords declared the above Veto Act ultra vires, so it was unenforceable by law.