Notwithstanding chapter 11 of this title, the Tennessee Drug Control Act of 1989, compiled in title 39, chapter 17, part 4, or another law to the contrary, a healthcare provider, researcher, patient, or research institution participating in a clinical trial involving ibogaine in compliance with this chapter and applicable federal law is not subject to criminal liability under the controlled substance laws of this state solely for conduct that occurs as part of such clinical trial, if such conduct is authorized by federal law.