4.__Successful completion.__ A person who fully participates in the program and who follows the individualized treatment plan successfully completes the program upon expiration of 6 months or certification by the assertive community treatment team physician or psychologist that the person is no longer in need of the services of the program.

5. Termination of participation.__Failure of a person to fully participate in the program and follow the individualized treatment plan may result in termination of participation in the program and rehospitalization under this subsection.

A.__If the person does not fully participate in the program and follow the individualized treatment plan and if the assertive community treatment team physician or psychologist determines, based on clinical findings, that as a result of failure to fully participate or follow the individualized treatment plan the person's mental health has deteriorated so that hospitalization is in the person's best interest and the person poses a likelihood of serious harm as defined in section 3801, subsection 4, paragraph D, the assertive community treatment team physician or psychologist shall complete a certificate stating that the person requires hospitalization and the grounds for that belief.__The person may agree to hospitalization or may be subject to an application for readmission under paragraph B.

B.__A person who participates in the progressive treatment program may be rehospitalized on an emergency basis under the provisions of section 3863 if the judicial officer reviewing the certificate under section 3863, subsection 3 finds that rehospitalization is in the person's best interest and that the person poses a likelihood of serious harm as defined in section 3801, subsection 4, paragraph D.__ This paragraph does not preclude the use of protective custody by law enforcement officers pursuant to section 3862.

C.__A person who participates in the progressive treatment program may be committed under section 3864 if the court reviewing the application finds that hospitalization is in the person's best interest and that the person poses a likelihood of serious harm as defined in section 3801, subsection 4, paragraph D.

D.__If the person has an advance directive or durable power of attorney or a guardian, the advance directive may be