17 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. Part V: Provisions Applicable to Particular Categories of Migrant Workers and Members of their Families Article 57 The particular categories of migrant workers and members of their families specified in the present part of the Convention who are documented or in a regular situation shall enjoy the rights set forth in part m and, except as modified below, the rights set forth in part IV. Article 58 1. Frontier workers, as defined in article 2, paragraph 2 (a), of the present Convention, shall be entitled to the rights provided for in part IV that can be applied to them by reason of their presence and work in the territory of the State of employment, taking into account that they do not have their habitual residence in that State.