According to an article by Radio Dabanga:
The Umma Party and the Popular Congress Party said establishing special courts is unconstitutional and against international conventions on human rights ratified by Sudan, as well as being destructive to the relationship between the two countries.
The parties call on the international community to intervene to protect civilians subject to arbitrary killing and arrest outside of the law.
Representatives also pointed out that Sudanese nomadic tribes routinely cross the border into South Sudan and back moving their livestock. The emergency declaration, they noted, also subjects citizens of Sudan to “extra-judicial murder and arrests.”