According to CBS News, Levi Johnston and Bristol Palin have reached a custody agreement. According to the document submitted to Superior Court in Anchorage, Palin will retain primary custody of their son, Tripp, and Johnston will be allowed twice-weekly visitation (on Wednesdays from noon to 6 p.m., and Saturdays from 9 a.m. to 4 p.m.). The court also set the financial basis for determining Johnston's future child-support payments at $72,000 per year. The agreement also contains language prohibiting the parents from saying negative things about each other, either to the press or in front of Tripp. According to CBS, the document stipulates that "the parties agree that the child shall receive positive reinforcement about each party and that the child has the right to be free of negative comments by one parent about the other." Read much more, here. TMZ quotes a bit more of the document regarding the trash-talking clause, saying the parents cannot "allow anyone else to speak badly about the other parent or members of their family in front of the child." Read more of that, here.