3-5 service providers will be invited to participate in the tender contest. Requests for prequalification shall be sent in a sealed envelope/package marked “13/00402- Prekvalifisering service og vedlikehold av parkeringsanlegg” to Avinor's visiting address: Dronning Eufemias gate 6, 0154 Oslo, Norway. The requests for prequalification shall contain information of contact person, telephone no., e-mail address and postal address.