The state building commission is hereby authorized and empowered to erect, construct, and equip the Mississippi Children's Rehabilitation Center, which shall have as its purpose the treatment and education of persons afflicted with cerebral palsy and other crippling conditions which are amenable to such treatment. The cost of constructing, erecting, and equipping such hospital may be paid from such funds as may be appropriated, or may heretofore have been appropriated, for such purpose by the legislature; and funds which are available to the state building commission or which have been set aside and earmarked for the construction, erection, and equipping of the "Crippled Children's Hospital" under the provisions of Chapter 291, Laws of 1954, or the "Mississippi Hospital School for Cerebral Palsy," under the provisions of Chapter 308, Laws of 1956, are hereby designated and shall be applied to the constructing, erecting and equipping of the Mississippi Children's Rehabilitation Center.