§ 82 BDSG
Mutual assistance
(1)The Federal Commissioner shall transmit information to and provide mutual assistance to the supervisory authorities in other Member States of the European Union, insofar as this is necessary for the consistent implementation and application of Directive (EU) 2016/680. Mutual assistance shall concern in particular information requests and supervisory measures, such as requests for consultation or for the carrying out of inspections and investigations.
(2)The Federal Commissioner shall take all appropriate measures required to reply to a request for mutual assistance without undue delay and no later than one month after receipt thereof.
(3)The Federal Commissioner may refuse a request for mutual assistance only where 1 he or she is not competent for the subject matter of the request or for the measures he or she is requested to execute or; 2 compliance with the request would violate legal provisions.
(4)The Federal Commissioner shall inform the requesting supervisory authority of the other state of the results or, as the case may be, of the progress of the measures taken in order to respond to the request for mutual assistance. He or she shall, in the case of Subsection (3), explain the reasons for refusing the request.
(5)The Federal Commissioner shall, as a rule, transmit the information requested by the supervisory authority of the other state electronically and in a standardised format.
(6)The Federal Commissioner shall handle requests for mutual assistance free of charge, unless he or she has agreed with the supervisory authority of the other state, in individual cases, on the reimbursement of expenditure incurred.
(7)A request for mutual assistance by the Federal Commissioner shall contain all the necessary information, including in particular the purpose and reasons for the request. The information transmitted in response to the request may be used exclusively for the purpose for which it was requested.