You were born in Malta in 1956 of American parents Do you have dual citizenship?

In 1964 Dual citizenship is severely restricted in Malta therefore the previous births will follow that rules and must have not the dual citizenship, it would be the American. In 1989 when the Malta citizenship became allowed at birth then again it was only to those infants whose parents have Maltian citizenship or born in Malta, So in both situation they do not allow dual citizenship to a baby for American couple.