While cross-border issues arise in the areas of taxation, immigration and social security, social security issues have also gained in importance in recent times, as they concern the pensions of people who venture across borders for employment. Under the “Sum of benefits” clause, a worker`s length of service in the host country must be counted towards the verification of the “eligibility” of the social security payment in the country of origin and vice versa. However, payment is limited in proportion to the country of permanent service. The single law offers solutions to social security agreements in a region where traditional multilateral agreements may not be feasible. Unfortunately, it has not overcome the difficulty of covering third-country nationals, who make up the majority of migrants in the region. As the largest recipient country, Canada has signed bilateral agreements with more than 50 countries. In addition, the aggregation of third countries for migrant workers is made possible by the Member States of 9 of the 13 States and territories that have signed and ratified the CARICOM Convention [see Multilateral Agreement]. These include Antigua and Barbuda, Barbados, Dominica, Grenada, Jamaica, Saint Lucia, Saint Vincent and the Grenadines, and Trinidad and Tobago. . .