A contribution to finance the mission provided for in IV of article L. 421-1 is introduced, payable by policyholders and allocated to the guarantee fund. This contribution is based on all net premiums or contributions paid by policyholders to insurance companies for civil liability risks resulting from accidents caused by land motor vehicles and vehicle trailers or semi-trailers when the risk is located throughout mainland France, the overseas departments, the Department of Mayotte, Saint-Barthélemy, Saint-Martin and Saint-Pierre-et-Miquelon. It is collected by insurance companies in accordance with the same rules and subject to the same guarantees and penalties as the tax on insurance policies. It is collected monthly by the guarantee fund. A decree sets the amount, up to a limit of 1% of these premiums or contributions. This contribution applies to premiums issued from 1 July 2013.