Del. Code Ann. tit. 29, § 6912
(b) The Section shall provide reasonable opportunity for each covered agency to participate in a user group if that covered agency anticipates the purchasing of materiel or service or services or a group of materiel and/or services under a specific central contract to be written and bid. A covered agency not participating in a user group shall not be grounds for an exception to the use of that central contract. A user group shall perform at least the following functions for the materiel or service or group of materiel and/or services to be purchased by a central contract:
70 Del. Laws, c. 601, § 6; 74 Del. Laws, c. 419, § 3; 75 Del. Laws, c. 88, § 22