1. Member States shall ensure that providers are not made subject to requirements which oblige them to exercise a given specific activity exclusively or which restrict the exercise jointly or in partnership of different activities.

However, the following providers may be made subject to such requirements:

(a) the regulated professions, in so far as is justified in order to guarantee compliance with the rules governing professional ethics and conduct, which vary according to the specific nature of each profession, and is necessary in order to ensure their independence and impartiality;

(b) providers of certification, accreditation, technical monitoring, test or trial services, in so far as is justified in order to ensure their independence and impartiality.

2. Where multidisciplinary activities between providers referred to in points (a) and (b) of paragraph 1 are authorised, Member States shall ensure the following:

(a) that conflicts of interest and incompatibilities between certain activities are prevented;

(b) that the independence and impartiality required for certain activities is secured;