81The cumulative conditions set out in Article 15(3) of Directive 2006/123 relate, first, to the non-discriminatory nature of the requirements in question, which may not be directly or indirectly discriminatory according to nationality or, with regard to companies, according to the location of the registered office; second, to their necessity, in other words they must be justified by an overriding reason relating to the public interest; and, third, to their proportionality, meaning that they must be suitable for securing the attainment of the objective pursued and must not go beyond what is necessary to attain that objective, and it must not be possible to replace those requirements with other, less restrictive measures which attain the same result.
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