These missionaries constituted churches in the different parts of the Indian Union and named them according to the sponsoring missions.These churches were formed through the work and witness of the following Missions in Northern India.
- American Evangelical and Reformed Church.
- American Marathi Mission of the American Board of Commissioners for Foreign Missions.
- American Presbyterian Mission
- Canada Presbyterian Mission
- Church of Scotland Mission
- Irish Presbyterian Mission
- London Missionary Society
- English Presbyterian Mission
- New Zealand Presbyterian Mission
- United Church of Canada Mission
- Welsh Presbyterian Mission
A joint conference of Presbyterian Church in India met at Allahabad on November 20 ,1918. Those present at this conference proposed Union between the Presbyterian Church, South India United Church (SIUC) Western India Congregational Churches and L.M.S. The name ‘ The United Church’ in India is suggested as the most suitable name for the new United Church. The name ‘General Assembly’ is suggested for the supreme body of the church, term ‘Synod’ is the best name for the bodies intermediary between the councils, presbyteries and General Assembly. .
The functionaries purchased properties and started/constructed churches, hospitals, schools and colleges, orphanages, leprosy homes and graveyards etc. They all kept working as per their own denominations. The properties of the above functionaries/ churches were managed and looked after by commission on Ecumenical mission and relations of United Presbyterian Church in United State of America (C.O.M.E.M.A.R.) which is also known as ” The Board of Foreign Mission and also known as “Punjab Mission.”
On December 30, 1924 the above said churches of Presbyterian faith along with Indian Christians who had faith in Presbyterian doctrine, formed a new body called United Church of Northern India (UCNI).
The second UCNI General Assembly was held in 1926 under the chairman ship of Rev. Allen Hume, Moderator of UCNI. The draft constitution was read over and was accepted in the Henrietta Colburn Hall of Hume Church in Ahmednagar ( Maharastra). In 1928, the same constitution was printed and published and since the cover of the book was blue ,the people called it Blue Book instead of Rules & Regulations of UCNI. It was framed so that all the churches follow the same customs and traditions and the way of worship and the administration of the church.
The constitution framed is based on the democratic principals. The democratic set up are as under:
The congregation of local church which consists of the representatives of various villages and cities in a zone.
b) Synod which consists of the representatives of al synods. General Assembly is the supreme body of the UCNI formed at national level.
In the year 1938 the UCNI floated a Trust namely United Church of Northern India Trust Association (U.C.N.I.T.A.) to manage and look after the properties of its principals U. C.N.I. The said Trust was registered under company Act 1913 at Bombay vide Registration No. 2912/1938-39. In the year 1938-39, there was no Trust Act, as such it was registered under company Act. In the year 1950, the Indian Government enacted Bombay Public Trust Act and the U. C.N.I. T.A. was registered at Bombay under Bombay Public Trust Act vide Registration No. D-97/1955.