Archbishop of Canterbury Dr Rowan Williams said it is "practically impossible" to expect a clearer response from the US Episcopal Church, which had earlier agreed to halt the ordination of openly gay bishops.
In his December 14 Advent letter addressed to the global Anglican Communion, Dr Williams - Anglican spiritual head - delivered a long-awaited response to the current crisis dividing the 77 million-member body.
"It is practically impossible to imagine any further elucidation or elaboration coming from TEC (The Episcopal Church) after the successive statements and resolutions from last year's General Convention onwards," Dr Williams wrote.
In September, The Episcopal Church - the US branch of Anglicanism - said it would "exercise restraint by not consenting to the consecration of any candidate to the episcopate whose manner of life presents a challenge to the wider church and will lead to further strains on communion".
It further pledged not to authorise public rites of the blessing of same-sex unions. At the same time, Episcopal bishops called for "unequivocal and active commitment to the civil rights, safety, and dignity of gay and lesbian persons".
The Episcopal Church had caused uproar in the global body when it consecrated openly gay bishop V Gene Robinson of New Hampshire in 2003.
Conservative Anglicans have demanded a clear response from the American branch on whether it would repent and get back in line with traditional Anglicanism or continue on its own path, apart from the rest of the Communion. They concluded from the September resolution that they saw no change in The Episcopal Church's liberal direction on theology and Scripture.
Across the global Communion, primates - highest leaders of the Anglican Communion's 38 provinces - came to no consensus about whether the American branch provided an adequate response.
Slightly more than half of the leaders were willing to accept The Episcopal Church's pledges while the rest regarded the response as "inadequate".
Dr Williams noted in his letter that it is "extremely unlikely" that a more substantial consensus will come out.
The Archbishop faulted the American branch and conservative Anglican leaders overseas, saying both sides have violated the Communion's boundaries.
