Subject to Articles 9 and 10, where a person subject to the legislation of one Party, and employed by an employer with a place of business in the territory of that Party, is sent by that employer, either from the territory of that Party, or from a third country not party to this Convention, to work in the territory of the other Party, he shall continue to be subject only to the legislation of the former Party as if he were employed in the territory of that Party, provided that the employment in the territory of the other Party is not expected to last for more than three years.