C.R.S. § 22-1-140
22-1-140. Corporal punishment prohibited - definition
22-1-140. Corporal punishment prohibited - definition. (1) A person employed by or volunteering in a public school, as defined in section 22-1-101, shall not impose corporal punishment on a child.
(2) (a) As used in this section, unless the context otherwise requires, "corporal punishment" means the willful infliction of, or willfully causing the infliction of, physical pain on a child.
(b) "Corporal punishment" does not include:
(I) An amount of force that is reasonable and necessary to quell a disturbance that threatens physical injury to persons or damage to property, necessary for purposes of self-defense, or used to obtain possession of a weapon or other dangerous object within the control of a child; or
(II) Physical pain or discomfort caused by athletic competition or other similar physical activity in which a child is voluntarily engaged.