Assembly Bill 558 aims to prohibit warrior-style training for law enforcement officers in Wisconsin, which is defined as training that dehumanizes individuals or promotes aggressive behavior, potentially increasing the likelihood of using deadly force. The bill establishes several restrictions: law enforcement agencies are barred from providing or arranging such training, reimbursing officers or collective bargaining units for related expenses, and contracting with organizations that offer warrior-style training. However, the bill allows for training in aikido, including reimbursement for such training.

The bill introduces new legal definitions and provisions, including the definition of "warrior-style training" and the designation of state agencies. It also specifies that the law enforcement standards board cannot provide certification or recertification credit for courses involving warrior-style training, while still allowing credit for aikido training. Additionally, the board is prohibited from reimbursing expenses for courses involving warrior-style training, but can reimburse for aikido training.