Mental Health & Substance Abuse Services, Dept. of - As introduced, directs the department to develop and implement, in consultation with the department of health, a public awareness campaign on mental health and gun safety; requires the department to make campaign materials available to the public for free on its website during calendar years 2024 and 2025; authorizes county health departments to develop a public awareness campaign on mental health and gun safety. - Amends TCA Title 33 and Title 68.