In order to gain full membership to the UN Israel agreed to implement Resolution 194. Israel never fulfilled that agreement like the Road Map. A law can be implemented back to the date it was imposed. Israels legal advisor Theodore Meron told the govt of Israel in 1967 that settlements contravened the explicit provisions of the Fourth Geneva Convention. Therefore given the Convention covers Refugees and Israel signed agreement to said Convention Israel is obligated to comply.
Spain investigating ex-IMF chief Rato for fraud (Reuters)
from the article: Like Israel, Palestinians must also learn the lessons of South Africa