The Conference say that Conf South will have only 21 teams next season if Salisbury fail to meet their payment deadline.
They face paying football creditors and a £50,000 bond by July 4th and, with the leagues below having completed their AGMs by that date an expulsion will mean nowhere to go for the Whites.
The same is expected to be true with the Bulls, who also have a July 4th deadline to meet Southern League criteria.