(30)Whereas some Member States do not subject insurance transactions to any form of indirect taxation, while the majority apply special taxes and other forms of contribution, including surcharges intended for compensation bodies; whereas the structures and rates of such taxes and contributions vary considerably between the Member States in which they are applied; whereas it is desirable to prevent existing differences' leading to distortions of competition in insurance services between Member States; whereas, pending subsequent harmonization, application of the tax systems and other forms of contribution provided for by the Member States in which risks are situated is likely to remedy that problem and it is for the Member States to make arrangements to ensure that such taxes and contributions are collected;