(34)Existing recordings of telephone conversations and data traffic records from a UCITS, management companies, investment companies, depositaries or any other entities regulated by this Directive, as well as existing telephone and data traffic records from telecommunications operators, constitute crucial, and sometimes the only, evidence to detect and prove the existence of infringements of the national law transposing this Directive, as well as to verify compliance by the UCITS, management companies, investment companies, depositaries or any other entities regulated by this Directive with investor protection requirements and other requirements laid down in this Directive and the implementing measures adopted pursuant hereto. Therefore, competent authorities should be able to require existing recordings of telephone conversations, electronic communications and data traffic records held by a UCITS, management companies, investment companies, depositaries or any other entities regulated by this Directive. Access to telephone records and data is necessary for the detection of, and imposition of sanctions for, infringements of the requirements of this Directive or its implementing measures. In order to introduce a level playing field in the Union in relation to access to telephone and existing data traffic records held by a telecommunications operator or the existing recordings of telephone conversations and data traffic held by UCITS, management companies, investment companies, depositaries or any other entities regulated by this Directive, competent authorities should, in accordance with national law, be able to require existing telephone and existing data traffic records held by a telecommunications operator, in so far as permitted under national law, and existing recordings of telephone conversations as well as data traffic held by UCITS, management companies, investment companies, depositaries or any other entities regulated by this Directive, in those cases where a reasonable suspicion exists that such records relating to the subject-matter of the inspection or investigation may be relevant to prove infringements of the requirements laid down in this Directive or its implementing measures. Access to telephone and data traffic records held by a telecommunications operator should not encompass the content of voice communications by telephone.