OBS_VALUE: Articles 18,19: Foreign nationals may be admitted to work if...this is in the interests of the economy as a whole.Art. 26 on cross-border services states that while precedence of domestic employees does not apply (art. 21) the activity shall be in the general interests of the economy.Directive: Criteria include the respective labour market situation and sustainable economic development. It shall also be avoided that foreigners compete with local workers to an undesirable extent and that wage and social dumping arise.