Subject to Kan. Stat. Ann. §§ 75-3763 and 75-3765, and amendments thereto, and related provisions of this act, the secretary of administration shall attend to the cleaning, repair, alteration and beautification of all buildings assigned by law to the charge, care, management and control of the secretary, and may enter into necessary contracts and authorize necessary expenditures therefor, such contracts and expenditures to be made in the manner provided by law for other state agencies.