Basic principle
Article 3
1. A roaming provider shall provide regulated retail roaming services at domestic price to its roaming customers who are normally resident in or have stable links entailing a frequent and substantial presence in the Member State of that roaming provider while they are periodically travelling in the Union. 2. Any fair use policy applied by a roaming provider in order to prevent abusive or anomalous usage of regulated retail roaming services shall be subject to the conditions set out in Articles 4 and 5 and shall ensure that all such roaming customers have access to regulated retail roaming services at domestic price during such periodic travel in the Union under the same conditions as if such services were consumed domestically.