Each former official and employee of the Government of the United States Virgin Islands, or of the Municipality of Saint Thomas and Saint John or of the Municipality of Saint Croix, who is receiving a pension of less than seventy-five ($75.00) dollars a month from the Government of the United States Virgin Islands by virtue of any retirement law or by special legislation is hereby granted a cost-of-living bonus of ten dollars per month, effective July 1, 1957.