...which allow him to be contacted rapidly and communicated with in a direct and effective manner; (d) where the service provider is registered in a trade or similar public register, the trade register in which the service provider is entered and his registration number, or equivalent...

...provider to be contacted rapidly and communicated with in a direct and effective manner. Moreover, where the service provider is registered in a trade or similar public register, the relevant information shall be communicated; so, too, where the activity is subject to an authorisation...

...and communicated with in a direct and effective manner; 22 Supreme Court Case 4 (Ob 219/03). 792 (d) where the service provider is registered in a trade or similar public register, the trade register in which the service provider is entered and his registration number, or equivalent...