One of four procedures through which a public body may award a contract under Public Sector Procurement Directive (www.practicallaw.com/8-385-1357). The restricted procedure allows any interested party to request to participate in the contract tender but only those invited by the public body following a pre-qualification stage may submit a tender. The other procedures are the Open procedure (www.practicallaw.com/6-385-1377), the Competitive dialogue procedure (www.practicallaw.com/0-385-1375) and the Negotiated procedure (www.practicallaw.com/5-385-1373).