Sec. 487.251. DEFINITIONS. In this subchapter: (1) "Executive commissioner" means the executive commissioner of the Health and Human Services Commission. (2) "Institutional review board" means a compassionate-use institutional review board established under Section 487.253. Added by Acts 2021, 87th Leg., R.S., Ch. 660 (H.B. 1535), Sec. 1, eff. September 1, 2021.