Clarifies that definition of mental illness in law governing involuntary commitment to treatment includes substance use disorder if dangerous standard met.

This bill clarifies that substance use disorder is included in New Jersey's legal definition of "mental illness" when it causes a person to be dangerous to themselves or others. It directly affects individuals with substance use disorders who meet the "dangerous" standard, allowing them to be subject to involuntary treatment requirements under the same rules as other mental health conditions. The key change explicitly adds substance use disorder to the definition of mental illness for commitment purposes, ensuring it is covered when the dangerous standard is met. This update does not lower the standard for requiring treatment but ensures substance use disorders are treated equally under the law.