1571. The Supervisory Authority may perform the functions (whether in whole or in part) referred to in section 905(2)(n)(iii) in so far as such functions are part of a joint inspection under—

(a) Commission Implementing Decision (EU) 2016/1156 of 14 July 2016¹¹ on the adequacy of the competent authorities of the United States of America pursuant to Directive 2006/43/EC of the European Parliament and of the Council, or

(b) any other Commission Implementing Decision made pursuant to Article 47(3) of the Audit Directive on the adequacy of competent authorities for the purposes of joint inspections.]