From an age perspective, the Special Rapporteur has found that there is a significant gap with regard to adults, including older adults, who are not generally taken into account in States' public policies. However, recent decades have seen significant changes in adult learning, reflecting the principle of lifelong education. The Hamburg Declaration on Adult Learning, adopted under UNESCO auspices in 1997, emphasizes the importance of sexual education for adults and sets out a commitment to "enabling people to exercise their human rights, including reproductive and sexual health rights, and to develop responsible and caring attitudes".