1.Authorisation schemes shall be based on criteria which preclude the competent authorities from exercising their power of assessment in an arbitrary manner.

2. The criteria referred to in paragraph 1 shall be:

(a) non-discriminatory;

(b) justified by an overriding reason relating to the public interest;

(c) proportionate to that public interest objective;

(d) clear and unambiguous;

(e) objective;

(f) made public in advance;

(g) transparent and accessible.

3. The conditions for granting authorisation for a new establishment shall not duplicate requirements and controls which are equivalent or essentially comparable as regards their purpose to which the provider is already subject in another Member State or in the same Member State. The liaison points referred to in Article 28(2) and the provider shall assist the competent authority by providing any necessary information regarding those requirements.