As regent, the princess mother carried out various official duties on behalf of the king, including accepting diplomatic credentials from newly posted ambassadors, conferring degrees on university graduates, presiding at religious ceremonies and putting her signature to several important legislative acts. She was the third female regent of the Rattanakosin era, the first being Queen Saovabha Phongsri during the reign of King Chulalongkorn (later became Queen Sri Bajrindra, the Queen Mother), and Queen Sirikit early on in the present reign. In the capacity, she put her signature to a number of important laws and declarations, including the Suppression of Prostitution Act of 1960, and the first National Economic Development Plan, 1961–1966.