The Church of England is being asked to give final approval to legislation banning clergy from being members of the British National Party.
Members of the Church's national assembly, the General Synod, will be asked to back an amendment to discipline measures making it "unbecoming" or "inappropriate" conduct for clergy to be members of a political party with policies and activities declared "incompatible" with Church teaching on race equality.
Under the proposals, Church of England bishops would make a declaration on parties or organisations deemed incompatible with Christian teaching.
Vasanatha Gnanadoss, a Metropolitan Police civilian worker and General Synod member, first won backing for the ban three years ago.
The General Synod, which is meeting at York University, will also hear a report from the Church Commissioners and discuss mission work.