Hungary has a series of older agreements on social security, including treaties with the former Soviet Union and Romania based on the territorial principle.  These agreements required each country to calculate and pay benefits under its own laws to its residents who had coverage under the other country’s social security system, as if they had coverage only under the paying country’s system.  Beneficiaries remain eligible for these benefits even if the social security treaty or agreement is no longer in force.  However, if a beneficiary under a territorial principle treaty or agreement leaves Hungary, then his or her benefit payments stop.  Article 4.3 provides that Hungary will not apply the equality of treatment or portability of benefits provisions of this Agreement to persons asserting rights under territorial principle agreements.