Each change order to a contract entered into under Kan. Stat. Ann. § 75-3741, and amendments thereto, shall be related to an item or a matter that was included within the original program statement which was prepared and submitted with the capital improvement budget estimate for the project under Kan. Stat. Ann. § 75-3717b. Each such change order may be negotiated with a contractor performing work under the original contract for the project unless the secretary of administration requires such change order to be let by competitive bids as a separate contract under Kan. Stat. Ann. § 75-3739, and amendments thereto.