4. States of employment shall prescribe the conditions under which a migrant worker who has been admitted to take up employment may be authorized to engage in work on his or her own account. Account shall be taken of the period during which the worker has already been lawfully in the State of employment. Article 53 1. Members of a migrant worker’s family who have themselves an authorization of residence or admission that is without limit of time or is automatically renewable shall be permitted freely to choose their remunerated activity under the same conditions as are applicable to the said migrant worker in accordance with article 52 of the present Convention. 2. With respect to members of a migrant worker’s family who are not permitted freely to choose their remunerated activity, States Parties shall consider favourably granting them priority in obtaining permission to engage in a remunerated activity over other workers who seek admission to the State of employment, subject to applicable bilateral and multilateral agreements. Article 54 1. Without prejudice to the terms of their authorization of residence or their permission to work and the rights provided for in articles 25 and 27 of the present Convention, migrant workers shall enjoy equality of treatment with nationals of the State of employment in respect of: (a) Protection against dismissal; (b) Unemployment benefits; (c) Access to public work schemes intended to combat unemployment; (d) Access to alternative employment in the event of loss of work or termination of other remunerated activity, subject to article 52 of the present Convention. 2. If a migrant worker claims that the terms of his or her work contract have been violated by his or her employer, he or she shall have the right to address his or her case to the competent authorities of the State of employment, on terms provided for in article 18, paragraph 1, of the present Convention. Article 55 Migrant workers who have been granted permission to engage in a remunerated activity, subject to the conditions attached to such permission, shall be entitled to equality of treatment with nationals of the State of employment in the exercise of that remunerated activity. Article 56 1. Migrant workers and members of their families referred to in the present part of the Convention may not be expelled from a State of employment, except for reasons defined in the national legislation of that State, and subject to the safeguards established in part III. 2. Expulsion shall not be resorted to for the purpose of depriving a migrant worker or a member of his or her family of the rights arising out of the authorization of residence and the work permit. 3. In considering whether to expel a migrant worker or a member of his or her family, account should be taken of humanitarian considerations and of the length of time that the person concerned has already resided in the State of employment. 28