In 1964, Lutz headed the Brazilian delegation at the 14th Inter-American Commission in Montevideo. Additionally, at the 15th annual meeting of the Inter-American Commission of Women held in 1970, she proposed to hold a seminar dedicated to addressing the specific problems faced by indigenous women. Although she was a little over seventy during this stage of her life, Lutz continued to attend conferences and push for the expansion of women's rights, including the World Conference on Women, 1975, in Mexico City.