Article 11
1. An insurer domiciled in a Member State may be sued: (a) in the courts of the Member State in which he is domiciled; (b) in another Member State, in the case of actions brought by the policyholder, the insured or a beneficiary, in the courts for the place where the claimant is domiciled; or (c) if he is a co-insurer, in the courts of a Member State in which proceedings are brought against the leading insurer. 2. An insurer who is not domiciled in a Member State but has a branch, agency or other establishment in one of the Member States shall, in disputes arising out of the operations of the branch, agency or establishment, be deemed to be domiciled in that Member State.