sentences:  In some states, there must be grounds or a cause of action to get a judicial decree of separation, such as "cruel and inhuman treatment ... abandonment ... neglect or refusal [to] support ... adultery by the defendant, [or] confinement of the defendant in prison ..." Reconciliation is allowed.So, therefore, separation is revocable; state laws may require "the joint application of the parties, accompanied with satisfactory evidence of their reconciliation ... by the court which rendered it, subject to such regulations and restrictions as the court thinks fit to impose.