In the case of an application for partial access for the purpose of establishing or providing a service, the competent authority shall refuse to issue the authorisation requested if it considers that one of the conditions laid down in I of article L. 4002-3 has not been met or if this refusal is justified on one of the grounds mentioned in II of the same article, in the light in particular of the opinions issued under the conditions defined in article R. 4002-2.