人權 人權立法 國家之規制權 穩定條款 凍結條款 經濟平衡條款 國家契約 公民與政治權利國際公約 經濟社會文化國際公約 Human rights Human rights legislation State's right to regulate Stabilization clauses Freezing clause Economic equilibrium clauses State contracts International covenant on civil and political rights ICCPR International covenant on economic, social and cultural rights ICESCR