extension of stay

[gerasimenko]

Пожалуйста, помогите перевести.

Выражение встречается в следующем контексте:\extention of stay. \\\\a person already present in the territory of a Member State as a visitor or student will not in principle be permitted to extend his stay for the purpose of taking or seeking employment. Such persons must return to their own countries on conclusion of their visit or studies.in principle a person admitted as a trainee or service provider or employee of a service provider will not admitted to extend his stay in authorised employment except in order to complete the training or activity under contract for which he was admitted

Заранее спасибо